Develop Bugs

[GUIDE] How to enable LTE on the Mobilicity / Wind / Vidéotron T889V

Hello everyone,
If you're using an SGH-T889V (originally from Vidéotron, Wind or Mobilicity) on a carrier that runs LTE on the AWS band, e.g.: Rogers, Bell, Telus, Fido, Virgin Mobile Canada, Koodo, AT&T or T-Mobile; this will allow you to enable LTE.
Note: Vidéotron has launched their LTE network in September 2014. As of writing this, it is unclear whether there will be a new T889V modem released with LTE enabled in the coming weeks, much like there was with T-Mobile USA when they launched their LTE network.
If you're using a T-Mobile USA SGH-T889, this guide isn't for you.
The usual disclaimers apply.
Actually, let me rephrase that: This mod permanently damages your phone, and irrevocably voids your warranty.
No one has been able to flash back to a T889V modem (be it ALJ4, BMA3, CMK4 or DNE7) without encountering bootloops afterwards.
Interestingly, T889VVLUDNH2 did not bootloop, it simply showed an "unknown" IMEI and baseband with no network connection.
Some background:
A rather lengthy post explaining what I did and what happened
TL;DR version of same
Additional relevant threads:
Getting LTE to work on fido
Need Help Please WIND 889V Borked
You'll need:
LTE - Coverage, known working microSIM, proper plan and system provisioning, etc...
Proper APN settings for your carriers on hand. (Better yet if you're running TouchWiz ROMs: proper CSC files and knowledge on how to modify and apply those.)
ADB
Clockworkmod/TWRP recovery
CWM/TWRP flashable I317M modem image. (I originally used the BMA3 modem, although the mod should work with any of them.)
Bell/Rogers/Telus I317M modem files
I317MVLALJ2 4.1.1 initial release (This one could be of interest for unlock purposes...)
I317MVLBMA3 4.1.2
I317MVLUCMK5 4.3
I317MVLUDNF1 4.4.2
I317MVLUDNF3 4.4.2 (I haven't downloaded the full Odin image and prepared a zip for this one.)
I317MVLUDNH2 4.4.2
Mobilicity/Vidéotron/Wind T889V modem files.
T889VVLALJ4 4.1.1 initial release - CAUTION: flashing this on top of a working ALJ4 modem installation has been known to cause bootloops and NV item corruption.
T889VVLBMA3 4.1.2
T889VVLUCMK4 4.3
T889VVLUDNE7 4.4.2
T889VVLUDNH2 4.4.2
Once you've downloaded the above files:
Backup your NV settings (in CDMA Workshop text format) as per this thread. You can also use the EFS Professional Tool (currently at version 2.1.61) almost identically to the older NV_reader_writer tool. (It also contains the IMEI NV item generator functions that Peoplearmy's tool had, apparently gone missing too.)
The only things I'll add are that:
RMNET + DM + MODEM is not available, you'll have to use RNDIS + DM + MODEM instead.
Finding the COM port can be done in device manager, you may need to refresh devices or disconnect and reconnect the USB port. If it's been properly detected, you can also click the Port text to the left of the droplist, there's an autodetect function there.
Also use this guide to backup (in QPST/QXDM .qcn format): http://forum.xda-developers.com/showthread.php?t=1946915
Optional: Backup the raw mk9efs partitions too, as per @connexion2005's suggestion: http://forum.xda-developers.com/showthread.php?t=2079705 (they're not necessary for the mod itself, and are only made as an additional precaution)
Optional: Backup the raw mk9efs and efs partitions with this CWM or TWRP "flashable" zip based on the Synergyrom team's work. It outputs the dumps in a ready-to-flash restore zip.
Consider backing up other files and data from your phone with the usual complement of Titanium Backup, nandroid and so on. Copy those off the phone.
If you're running an AT&T or T-Mobile ROM: you may have to flash another ROM as well. The stock T889V ROM has a "Network Mode" setting that lets you toggle between LTE/WCDMA/GSM, WCDMA only and GSM only. The I317M and N7105 ROMs also have this, while the I317 and T889 probably don't.
On the T889V ROMs: to see LTE become an option, you'll need to edit your CSC files and remove the <CscFeature_Setting_DisableNetworkMode>lte</CscFeature_Setting_DisableNetworkMode> line in /system/csc/others.xml. This setting is only cosmetic: the notification bar icon will show "4G" and you won't see LTE in the network mode settings. However, the phone will still use LTE, which can be confirmed by looking in Settings / About Phone / Status. (I've come across this while flashing ROMs with unaltered CSC files.)
Let's proceed with the actual modification:
Reboot to recovery, flash the 317M BMA3 modem. Wipe /cache and Dalvik cache for good measure.
Reboot phone. No bootloops? Good.
Check in Settings / About Phone that you still have a valid IMEI. (It's possible you still do at this point.)
Reboot the phone. This time the IMEI and service should be lost.
Using the same procedure you did to back them up, restore your NV items.
Reboot the phone.
Confirm your IMEI is correct and that you have service.
Check in Settings: Wireless and networks -> More settings -> Mobile Networks -> Network Mode that LTE/WCDMA/GSM is selected. Another menu worth mentioning here is the "Band Selection" menu accessed through the *#2263# dialer code. Note that if you force the phone onto the LTE bands, you will only have data service, and no voice calls or SMS.
I'd like to thank the following users for their help and feedback in writing this guide: @Byangmang, @deeznutz1977, @dspkeff, @hkfan, @rail205, @TEKHD
Good luck,
Darkshado

Thank you so much. I have been waiting for this day to come. All the best, Darkshado! :beer:
Sent from my SGH-T889 using xda app-developers app

Works. Thanks allot. Only thing I didn't do is restore the 3 files backed up via adb.

jfive74 said:
Works. Thanks allot. Only thing I didn't do is restore the 3 files backed up via adb.
Click to expand...
Click to collapse
Those are very much a belt and suspenders bit. They're not to be restored in the instructions, and my inclusion here is mostly because connexion2005 had requested a set for a JTAG repair. I'm taking a guess here, but if there's any calibration data or other phone specific parameters in there, having those from your device on hand can't be bad.

What if I suffer boot loops, didn't do any backups, and my IMEI is already Zeroed out on my T889V? How can I fix this?
I have my IMEI still since it's written on the purchase box of the phone.
I used to be wind, now virgin mobile with LTE sim. I flashed tmobile modem. No love. Flashed T889V modem back, then got boot loops.
Please help!!!
edit:
Hi Darkshado, really hoping you can help.
I've done more reading. I can't seem to make the boot loops stop.
I've done odin to factory rom image. No luck.
I tried i317 custom modem you have here on XDA, no luck. Also Tmobile modem, etc... no luck.
I used CWM and permission fix, etc.. no luck.
My boot loop is a little weird. It will boot and stay live (working - no signal though) for about a min, then it will say some android.media.process is not responding and reboot.
So I can't get NV to inject my IMEI as it will reboot too soon. From what I read, NV needs 5-10 min??
basically, I did JEDIX-15 tmobile rom install with latest tmobile modem. That's how I got into this mess. I have a T889V and virgin LTE sim such as yourself.
I just can't seem to make the boot loops end so I can move forward....

Try writing flashing back the T889 baseband and restoring a T889 or T889V NV items backup.
http://www.mediafire.com/download/p5025pxtp9vgk4k/NV_items.7z

Will this do?
T889UVBMD1
from: http://forum.xda-developers.com/showthread.php?t=2102380
I'm going to try and odin the factory image and see if that stops the reboots.
I'm guessing baseband is the same as modem correct?
I'll go give it a try now and use CWM to inject it first before I odin.
I've never done an NV restore let alone backup, so that seems to be my hick up. I'll do some research and get that done then and get back to you.
Thanks for the assistance.
edit:
I'll try to write NV, but that might be an issue since I need the phone not to reboot, and it does in under a minute usually.
Any suggestions, or specific rom I can try to write so I can eliminate the reboots so I can do the nv?
edit2:
ok, the tmo modem from that link above worked. It's not boot looping after a min now!
There is still zero signal. Does not connect. When I do *#2263# and choose automatic, it says menu does not exist, etc...
going to to try inject my IMEI with NV.
Will report back.
Edit 3
Ok, just used nv read/write to inject your t889v nv file. Then generated my imei and injected that.
reboot, and got signal! yay.
thank you so much!\
When I go to settings. I only see WCDMA/GSM/AUTO. No LTE option. I think I read somewhere that is cosmetic?
If I NV write the T889 NV file from deeznutz1977 will that fix it cosmetically?
Thanks again!
Darkshado said:
Try writing flashing back the T889 baseband and restoring a T889 or T889V NV items backup.
http://www.mediafire.com/download/p5025pxtp9vgk4k/NV_items.7z
Click to expand...
Click to collapse

20% More Awsomeness
I switched over to Telus sine Mobilicity is going under . I could only get HSPA+ @ 5Mbps, Now I too have fully working LTE. Albeit with weaker signal strenth due to higher band freqency. But I can just toogle LTE when needed. I must admit that second reboot with IMIE 0 and no service was a bit nerve racking, but the backup was flawless. Thanks a million OP. ^_^

i edited the csc called other....
and the LTE line was already not present.
The LTE option is still not in the mobile settings however.
When I do the *#2263# menu and set it to LTE the data does keep working. And I do see it in the system info. Also using a tmobile radio with the JEDI-X15 rom. yay.
But I'd like to solve the cosmetics side of it.
I did inject the t889V nv setting.... could that affect it? Would the t889 NV settings fix it?
edit:
still no luck getting LTE option to appear, although it works, I'd like to solve the cosmetic side of it.
Any help?

You can also get confirmation that LTE is active by checking in About phone / Status.
I don't feel like going through the 664 pages of the Jedi X ROM thread to see if they've altered the network icons or not. Being based on the N7105 ROMs icons with either "4G" or "LTE" captions should be present. Are you editing the active CSC files? Namely those in /system/csc/ ?
I should mention that some CSC edits only apply upon factory reset, e.g. activating WB-AMR, (a.k.a. HD Voice). One neat trick is to make a backup in recovery (nandroid or TWRP), factory reset, then reboot to recovery and restore the backup. I don't recall if this applies to the network icon related lines or not.

Older Modems
Question?
As I stated before it was a smooth transition. But... Some claim the older modem worked better (I317M-I317MVLALJ2). I tried through TWRP as before but the return status says FAILED. No changers are thus made. Any ideas? Thanks.

I've been able to flash back and forth between ALJ2 and BMA3. You're saying the linked ALJ2 zip refuses to flash? I'll have to check, but this might take a few days as I'm:
-rather busy IRL
-stuck using my old laptop (mushy, thoroughly worn out keyboard with an overzealous enter key that fires the moment you hint at touching it and a dead left shift key) while the other is in warranty repair (failing PSU seems to have damaged the motherboard and/or dGPU)
Goodbye,
Darkshado

Darkshado said:
You can also get confirmation that LTE is active by checking in About phone / Status.
I don't feel like going through the 664 pages of the Jedi X ROM thread to see if they've altered the network icons or not. Being based on the N7105 ROMs icons with either "4G" or "LTE" captions should be present. Are you editing the active CSC files? Namely those in /system/csc/ ?
I should mention that some CSC edits only apply upon factory reset, e.g. activating WB-AMR, (a.k.a. HD Voice). One neat trick is to make a backup in recovery (nandroid or TWRP), factory reset, then reboot to recovery and restore the backup. I don't recall if this applies to the network icon related lines or not.
Click to expand...
Click to collapse
yep, I edited those CSC files as per your original write up.
I did not factory reset. And yes, you are right. A good example is the Nexus 4. It needs a factory reset to keep the LTE settings ( unless you go to the "INFO" menu, and then you need to reset again.
Okay, I'll try the reset tonight. See what happens. And yes, I see LTE in system info.
Also, when I use speedtest, it records it as lte.
Honestly, I'm just happy it works again...

Darkshado said:
I've been able to flash back and forth between ALJ2 and BMA3. You're saying the linked ALJ2 zip refuses to flash? I'll have to check, but this might take a few days as I'm:
-rather busy IRL
-stuck using my old laptop (mushy, thoroughly worn out keyboard with an overzealous enter key that fires the moment you hint at touching it and a dead left shift key) while the other is in warranty repair (failing PSU seems to have damaged the motherboard and/or dGPU)
Goodbye,
Darkshado
Click to expand...
Click to collapse
Problem Solved. The issue was I am using SDCard encryption. For some reason TWRP can SEE the cards files, but not use them. When I moved the modem to internal it installed fine. Sorry bout that.

If I enable lte using this method then will aws still works for WindMobile?
Sent from my SGH-T889 using Tapatalk 2

hkfan said:
If I enable lte using this method then will aws still works for WindMobile?
Sent from my SGH-T889 using Tapatalk 2
Click to expand...
Click to collapse
Probably Not? There are threads of people trying to get there i317 to work with AWS. http://forum.xda-developers.com/showthread.php?t=2068041
Then again this is a t989v. Don't risk it unless your prepared to not go back.

hkfan said:
If I enable LTE using this method then will AWS HSPA still work for WindMobile?
Click to expand...
Click to collapse
It should. My data in this department is very limited, since I don't have an active Videotron account on hand. With that said, I got a working speed test on Videotron's AWS HSPA shortly after sorting my phone out this winter. (I simply dropped by one of their stores while at a shopping mall and nicely asked a sales rep to borrow an active SIM card. Showed her the menu unlock method as a thank you.)
I also got to use the phone with T-Mobile USA earlier this year, getting both HSPA (some of it likely AWS, though I didn't get the time to check) and LTE.

@Darkshado thank you very much for the T889VVLUDNE7 modem. I just flash the zip in cwm and it work perfect for my Videotron T889V.

Thanks for putting this together!!
Quick question - I have a t889v from Wind Mobile. I switched carriers to Rogers, and in the process screwed up my phone and had no IMEI/Baseband. Had to send it in for repair to replace the board. It came back with the baseband T889UVUCMK7.
Do you think I can still use this method? I'm currently running a T-mobile Touchwiz 4.4.2 ROM (Test Rom v1.2).

What does download mode give as product ID? You may well have a U.S. board in there now.
The later T-Mobile T889 basebands support LTE out of the box. Make sure your APN settings, plan and SIM card are correct, and that the modem you have does support LTE; if not, you might just need to update that.
I know some people here followed essentially the steps I did, but with the T889 modem instead, but I don't think it applies here.
Good luck,
Darkshado
Sent from my T0LTE using XDA Free mobile app

[Q] Note 2 does not work ATT To T-mobile, wife's iPhone 5 works fine

Hi,
I have note 2 from AT&T at 4.1.1 with I317UCALJ2 and I took t-mobile connection, I can not have mobile hotspot on. Also I get call drops and less 4G connection as compared with my wife's iPhone 5, she is having consistant 4G and mobile hotspot. I called t-mobile they changed my APN settings to fast-t-mobile.com, but it did not work much, then I was reading a forum and I dialed *#2263# and selected WCDMA ALL (when I did that my APN in the settings changed back to epc.tmobile.com). Now I am getting 4G band but still no mobile hotspot.
My phone is unlocked, I unlocked my phone using the key combinations posted in this forum last year. What should I do to make my phone more usable?
Thanks

sounds like some software problems try more roms..

Hi
vista1984 said:
sounds like some software problems try more roms..
Click to expand...
Click to collapse
I am not rooted and I have the stock ROM. Can someone please guide through the process?

Don't check CDMA all. Check LTE and then make sure you use the fast.tmobile.com SONg setting
Sent from a Galaxy Note 2

I tried, still no luck
tube517 said:
Don't check CDMA all. Check LTE and then make sure you use the fast.tmobile.com SONg setting
Sent from a Galaxy Note 2
Click to expand...
Click to collapse
I tried that, still no luck, should I put any custom ROM? if yes then which one?

No rom yet....
Since you are changing carriers entirely...have you cleaned the device to make sure no bad data is present ??
I would suggest doing a factory reset to clean the device....
Then enter in the T-Mobile APN again and test...
If the process does not help ...a new or different modem may be needed to improve your signal...
All of the steps to do this are in the general and development sections...and you should begin by searching and reading the steps....
Go slowly...until you understand the process...and only then should you attempt any flashing....
We will be here to help....but you need to learn the process if you intend to flash files to this device...
Start in the "everything" thread in the general section....
It covers the basics of root and flash procedure...and how to avoid mistakes that catch several people...
And do not update your device via OTA...
It will give you a Knox bootloader...and that is not good for users...especially new users to flashing...
Read much....learn much...and only then should you flash....g
Sent from my NOTE 2.750...
Courtesy of our amazing developers...

are you seeing LTE signal? if not, then you are on T mobile's legacy 3g or possibly the reformed 1900 hspa. Since the phone will not get 42mbps hspa, your speed maybe a bit lower due to 21mbps hspa. I am using the phone on t mobile network and do not have issue. i did have the latest att modem. When I was on the 4.1 rome, I did flashed the latest modem before the 4.3 rome.

PUTALE said:
are you seeing LTE signal? if not, then you are on T mobile's legacy 3g or possibly the reformed 1900 hspa. Since the phone will not get 42mbps hspa, your speed maybe a bit lower due to 21mbps hspa. I am using the phone on t mobile network and do not have issue. i did have the latest att modem. When I was on the 4.1 rome, I did flashed the latest modem before the 4.3 rome.
Click to expand...
Click to collapse
I unlocked the phone, I also have supersu and triangle away on my phone. I do not remember what all I did. But I am on 4.1.1. If I do a factory reset, will I loose everything meaning unlock etc? Or should I install a modem? If yes then which one?

If you are ready for the 40 mbps hack....here ya go...
If you have a PC and a few minutes....this link will get you on track ...
I use ATT and have never used this method...but many have...and report proper speeds after unlock to TMO...
Good luck...g
http://forum.xda-developers.com/showthread.php?t=2068041
Sent from my NOTE 2.750...
Courtesy of our amazing developers...

ask_j said:
I unlocked the phone, I also have supersu and triangle away on my phone. I do not remember what all I did. But I am on 4.1.1. If I do a factory reset, will I loose everything meaning unlock etc? Or should I install a modem? If yes then which one?
Click to expand...
Click to collapse
factory reset should not change your unlock. The phone should stay as SIM unlocked (if that is what you meant). Once it is sim unlocked, it will stay as unlocked. It should not affect your root either as factory reset (though I am not 100% sure since I have custom rom so cannot remember if stock rom will remove root). Often it is best to stay with the same modem as the rom version. Here is the link to the modem list: http://forum.xda-developers.com/showthread.php?t=1987541
I have the latest one but I am using 4.3 rom. I cannot recall which modem I had when I had 4.1.2 rom so do a bit search, but I think it is the MJ4.

[Q] Samsung SGH-I747 Only Edge Reception

Hello I am currently living in Argentina where 3g is in the 850MHz/1900MHz range.
I use to have a Motorola ATRIX 4G and worked perfect on 3g.
Now I have an SGH-I747 and can only get EDGE signal. If I look at my network it only sees it as EDGE.
Have tried:
1. On stock rom, tried changing the frequency of WCDMA to 1900MHz and would loose all connection even GSM.
2. Flashed with CyanogenMod and now have the latest modem for the I747 (actually when installing it recognized my cellphone as AT&T Canadian version which does not make sense).
One last comment, my old phone had HSDPA and this phone has HSPA+ (are these compatible?)
Any help would be deeply appreciated!

deambulante said:
Hello I am currently living in Argentina where 3g is in the 850MHz/1900MHz range.
I use to have a Motorola ATRIX 4G and worked perfect on 3g.
Now I have an SGH-I747 and can only get EDGE signal. If I look at my network it only sees it as EDGE.
Have tried:
1. On stock rom, tried changing the frequency of WCDMA to 1900MHz and would loose all connection even GSM.
2. Flashed with CyanogenMod and now have the latest modem for the I747 (actually when installing it recognized my cellphone as AT&T Canadian version which does not make sense).
One last comment, my old phone had HSDPA and this phone has HSPA+ (are these compatible?)
Any help would be deeply appreciated!
Click to expand...
Click to collapse
Was it unlocked? There are chances that the nv file got damaged in the process.

BWolf56 said:
Was it unlocked? There are chances that the nv file got damaged in the process.
Click to expand...
Click to collapse
The cellphone was factory unlocked. I bought it from EBAY.
I had bought it as a i9300 and even the sticker behind the battery says GT-i9300 but the cellphone is an SGH-i747 from the specs and Cyanogenmod recognized it as that (I ran Phone Info and CPU identifier to get that it was a d2att model with dual core and 2gb of ram).
How do I fix or find out if the nv file is broken?
Thanks in advance!

You said you have the latest modem installed. Does this mean you have the NE4 (4.4.2) modem, and if so had you fully updated to 4.4.2? If not, what is your base firmware build?
If you don't know, open Terminal Emulator and enter this:
getprop ro.bootloader
If you are running the NE4 modem on 4.1.2 or earlier firmware, you'll probably need to go back to a matching one, or fully update to the latest firmware.
Note: running the 4.4.2 modem on 4.3 firmware will hard brick your device.
While you are checking all of this, also make sure your IMEI matches the one on the sticker under the battery.

DocHoliday77 said:
You said you have the latest modem installed. Does this mean you have the NE4 (4.4.2) modem, and if so had you fully updated to 4.4.2? If not, what is your base firmware build?
If you don't know, open Terminal Emulator and enter this:
getprop ro.bootloader
If you are running the NE4 modem on 4.1.2 or earlier firmware, you'll probably need to go back to a matching one, or fully update to the latest firmware.
Note: running the 4.4.2 modem on 4.3 firmware will hard brick your device.
While you are checking all of this, also make sure your IMEI matches the one on the sticker under the battery.
Click to expand...
Click to collapse
It probably won't match if the phone says SGH-747 and the battery says GT-9300.

DocHoliday77 said:
You said you have the latest modem installed. Does this mean you have the NE4 (4.4.2) modem, and if so had you fully updated to 4.4.2? If not, what is your base firmware build?
If you don't know, open Terminal Emulator and enter this:
getprop ro.bootloader
If you are running the NE4 modem on 4.1.2 or earlier firmware, you'll probably need to go back to a matching one, or fully update to the latest firmware.
Note: running the 4.4.2 modem on 4.3 firmware will hard brick your device.
While you are checking all of this, also make sure your IMEI matches the one on the sticker under the battery.
Click to expand...
Click to collapse
Ok here is the info you asked for:
My phone is a d2att / d2lte
The bootloader and Baseband Version are I747UCUEMBJ
(I don't know if these are the NE4 Modem, but I searched for modem files and these seemed to be the latest one out there)
I am running Cyanogenmod 4.4.4
IMEI number on the back and using Phone Info Match! That is weird...

Id flash the full stock 4.3 firmware with Odin, factory reset and test it out.
(Factory resetting with stock recovery will wipe your internal sd card, so back it up first)

DocHoliday77 said:
Id flash the full stock 4.3 firmware with Odin, factory reset and test it out.
(Factory resetting with stock recovery will wipe your internal sd card, so back it up first)
Click to expand...
Click to collapse
I will try this weekend and get back to you on monday with results.
Where can I find stock 4.3 rom for SGH-I747. I looked at SamMobile but they only have up to 4.1.1?
Thanks!

Enewman17 has it in the development section I think. Someone else has it in General too. Both are safe to use.

i think this could be it. double check though please.
http://forum.xda-developers.com/showthread.php?t=1968625
backupbackupbackup.
good flashing
err on the side of kindness

I only see up to build MJ2 available there. MJB is needed. Ill post the link in a min.
---------- Post added at 11:34 PM ---------- Previous post was at 11:30 PM ----------
Here it is.
http://forum.xda-developers.com/showthread.php?p=52006506
The one by enewman17 I mentioned was recovery flashable, not Odin, do I was mistaken there. (He does have the Odin flashable package in one of his update threads, but the one I linked is easier to find)

i better leave this to the professionals. lol
good save huckleberry. :thumbup:
going back to just trolling and learning.
err on the side of kindness

Nah, not a big deal man. IME, you can actually learn a lot more by trying help folks out. If you ever mention something that's incorrect, someone will usually post a correction fairly quickly. Or in a case like this, Odin would have prevented anything from being flashed, so there wasn't really much to worry about other than time spent.
Anyway, don't let getting something wrong discourage you. Happens to everyone regardless of how well versed they are on a particular subject!

DocHoliday77 said:
I only see up to build MJ2 available there. MJB is needed. Ill post the link in a min.
---------- Post added at 11:34 PM ---------- Previous post was at 11:30 PM ----------
Here it is.
http://forum.xda-developers.com/showthread.php?p=52006506
The one by enewman17 I mentioned was recovery flashable, not Odin, do I was mistaken there. (He does have the Odin flashable package in one of his update threads, but the one I linked is easier to find)
Click to expand...
Click to collapse
Downloaded all zip files but there is an error in the archive when trying to extract... I will try to find it elsewhere and report back after flashing!
Sorry for the delay but work has been hectic.

Use 7zip, select all files s t once and extract.

DocHoliday77 said:
Use 7zip, select all files s t once and extract.
Click to expand...
Click to collapse
Did everything, the stock rom installed perfectly but I am still only getting Edge reception.
I really don't know what it could be, the frequencies are supported (850 and 1900).
I use to have a Motorola Atrix which has the same triband and it worked perfectly.
Could it have something to do with the difference between HDSPA and HSPA+?
Here in Argentina the international model GT-I9300 works with 3G.
Thanks again!

HSDPA/HSUPA are basically just part of HSPA. The D=downlink U=Uplink
So I doubt that has any real bearing on the problem.
The i9300 is a very different device and I know little about it, so I cant say much there.
Can you borrow a sim card to try? Or a device to test your sim in?

DocHoliday77 said:
HSDPA/HSUPA are basically just part of HSPA. The D=downlink U=Uplink
So I doubt that has any real bearing on the problem.
The i9300 is a very different device and I know little about it, so I cant say much there.
Can you borrow a sim card to try? Or a device to test your sim in?
Click to expand...
Click to collapse
I still have the Motorola Atrix, and have been using it with my chip for a while with 3G. I will try my chip in that phone again just in case to see if there is anything wrong with my network.
The Motrola Atrix has the following network frequencies: WCDMA 850/1900/2100 MHz, GSM 850/900/1800/1900 MHz.
The Samsung SGH-I747 has the following network frequencies: 850, 900, 1800, 1900 MHz GSM / GPRS / EDGE, 850, 1900, 2100 MHz UMTS / HSPA+.
They should be compatible on the same network right? Or is there a difference between WCDMA and UMTS/HSPA+ ?
I will try the chip just in case and have an answer by tomorrow!

its just a guess since we dont know for certain its the problem, but notice that the 2100 band is WCDMA on your moto, but is for GPRS/EDGE (2G) on the S3. Might have something to do with it. But im not sure. Depends on what bands AT&T uses for which network technology. (someone else would probably be better equipped to answer that though since im not with AT&T)

deambulante said:
I still have the Motorola Atrix, and have been using it with my chip for a while with 3G. I will try my chip in that phone again just in case to see if there is anything wrong with my network.
The Motrola Atrix has the following network frequencies: WCDMA 850/1900/2100 MHz, GSM 850/900/1800/1900 MHz.
The Samsung SGH-I747 has the following network frequencies: 850, 900, 1800, 1900 MHz GSM / GPRS / EDGE, 850, 1900, 2100 MHz UMTS / HSPA+.
They should be compatible on the same network right? Or is there a difference between WCDMA and UMTS/HSPA+ ?
I will try the chip just in case and have an answer by tomorrow!
Click to expand...
Click to collapse
Tengo el mismo problema que vos, encontraste la solución?

[Q] E986 Greek

I own an E986 for one month, I bought it from Greece but it must be from Germany. My problem is that after rooting and installing many custom roms and stock roms I dont have 4g signal. I have tried everything, hidden menus, 4g switchers, flashing modems from allover the world just in case something works, flashing back to stock with lg flash tool, I tried stock 4.1.2 and 4.4.2, I erased APN's and added again......and many many more. Can anybody please help me? I will try any ideas, one last thing, the signal of the mobile carrier is depending only on the modem I install or are there any other parameters that I should try to flash. Thanks in advance!!!!

tzamakos said:
I own an E986 for one month, I bought it from Greece but it must be from Germany. My problem is that after rooting and installing many custom roms and stock roms I dont have 4g signal. I have tried everything, hidden menus, 4g switchers, flashing modems from allover the world just in case something works, flashing back to stock with lg flash tool, I tried stock 4.1.2 and 4.4.2, I erased APN's and added again......and many many more. Can anybody please help me? I will try any ideas, one last thing, the signal of the mobile carrier is depending only on the modem I install or are there any other parameters that I should try to flash. Thanks in advance!!!!
Click to expand...
Click to collapse
If you've flashed back to a stock TOT/KDZ and still have no 4G, then it seems like it cannot be any software setting other than APN configuration, and if you're certain that's right, then it could be worth it to try a different SIM card.
What else could it be? If you've flashed a correct stock image for your model, then you've ruled out software issues other than configuration, and if it once worked with the same software configuration (APN settings, etc.) then what else could it be but hardware, something tangible?

culot said:
If you've flashed back to a stock TOT/KDZ and still have no 4G, then it seems like it cannot be any software setting other than APN configuration, and if you're certain that's right, then it could be worth it to try a different SIM card.
What else could it be? If you've flashed a correct stock image for your model, then you've ruled out software issues other than configuration, and if it once worked with the same software configuration (APN settings, etc.) then what else could it be but hardware, something tangible?
Click to expand...
Click to collapse
So what do you believe? Do you think that I have a hardware issue? But how on earth is it possible to have 3g and H signal but no 4g. I have flashed every stock rom for my device through kdz method but I haven't tried the tot method, do you believe that this might be the solution? I have even bought another sim card from my provider but no luck, should I try another provider? Phewwww I ask a lot I know please forgive me it' s that I have never faced a problem before that I couldn't overcome......

tzamakos said:
So what do you believe? Do you think that I have a hardware issue? But how on earth is it possible to have 3g and H signal but no 4g. I have flashed every stock rom for my device through kdz method but I haven't tried the tot method, do you believe that this might be the solution? I have even bought another sim card from my provider but no luck, should I try another provider? Phewwww I ask a lot I know please forgive me it' s that I have never faced a problem before that I couldn't overcome......
Click to expand...
Click to collapse
KDZ is sufficient. I don't see how TOT would make any difference. Maybe you could try just to familiarize yourself with the method. I don't see how that could make any difference, but maybe I'm more ignorant that I realize (this happens often enough).
So you've had 4G on that phone with that same provider before? WIth the same plan? If it's not software, and not hardware, then maybe it's to do with the carrier? I think you can be pretty safe that it's not software if you've got a stock image flashed on there, and if your APN settings are spot-on. That would leave:
- SIM card
- Phone hardware
- Carrier
- ?what else?
If it's not software, as in if you've got a fresh stock image flashed, then what else could it be but hardware? Maybe I'm missing something.. dunno.
Have you tried the SIM cards in any other phone to see if 4G works?

culot said:
KDZ is sufficient. I don't see how TOT would make any difference. Maybe you could try just to familiarize yourself with the method. I don't see how that could make any difference, but maybe I'm more ignorant that I realize (this happens often enough).
So you've had 4G on that phone with that same provider before? WIth the same plan? If it's not software, and not hardware, then maybe it's to do with the carrier? I think you can be pretty safe that it's not software if you've got a stock image flashed on there, and if your APN settings are spot-on. That would leave:
- SIM card
- Phone hardware
- Carrier
- ?what else?
If it's not software, as in if you've got a fresh stock image flashed, then what else could it be but hardware? Maybe I'm missing something.. dunno.
Have you tried the SIM cards in any other phone to see if 4G works?
Click to expand...
Click to collapse
To tell you the truth I haven't tried the sim to another phone because I don't have another 4g phone, I have contacted my carrier and they confirmed that I have 4g signal. Who knows, I cant understand how it could be a hardware issue since I have 3g and H signal, do you know if apart from modem is there anything else that I could flash in order to have better signal reception? For example flashing kernel or something else....

tzamakos said:
To tell you the truth I haven't tried the sim to another phone because I don't have another 4g phone, I have contacted my carrier and they confirmed that I have 4g signal. Who knows, I cant understand how it could be a hardware issue since I have 3g and H signal, do you know if apart from modem is there anything else that I could flash in order to have better signal reception? For example flashing kernel or something else....
Click to expand...
Click to collapse
Maybe visit some cell phone shop and ask if you can ram your SIM into one of their phones for a minute, to test.
If you've flashed a KDZ, I don't see what else you could do, software-wise, on top of that. Have you ventured very far into the hidden diagnostic menus? I know there's tests in there for most everything, ones that show if you've got a 4G connection and exactly what detailed connection info is available.
EDIT: Oh, you can look into your service manual here. Maybe you could pull a MacGyver, yes?

culot said:
Maybe visit some cell phone shop and ask if you can ram your SIM into one of their phones for a minute, to test.
If you've flashed a KDZ, I don't see what else you could do, software-wise, on top of that. Have you ventured very far into the hidden diagnostic menus? I know there's tests in there for most everything, ones that show if you've got a 4G connection and exactly what detailed connection info is available.
EDIT: Oh, you can look into your service manual here. Maybe you could pull a MacGyver, yes?
Click to expand...
Click to collapse
I followed your advice, I tried my sim to another 4g phone and it works perfectly, I even bought a sim card from another provider just in case but again no luck, 4g signal wont show on. The hidden menu is something that I have discovered but dont know what values to change, I just checked that lte is enabled. My only hope is to find the original stock rom for Greece named e98610c.kdz I believe to flash it and see if it works, but I cant find it anywhere. My phone is from Germany though, another option I have is to find a second stock rom from Germany different than the e98610i.kdz, I have seen an e98610a.kdz, but I wasnt able to find and download it. Any help would be very nice, but thanks anyway.

culot said:
Maybe visit some cell phone shop and ask if you can ram your SIM into one of their phones for a minute, to test.
If you've flashed a KDZ, I don't see what else you could do, software-wise, on top of that. Have you ventured very far into the hidden diagnostic menus? I know there's tests in there for most everything, ones that show if you've got a 4G connection and exactly what detailed connection info is available.
EDIT: Oh, you can look into your service manual here. Maybe you could pull a MacGyver, yes?
Click to expand...
Click to collapse
Hallo again, one more question, is it possible that I have flashed a modem that is capable of 4g but in bandwith that my provider in Greece doen't support?

tzamakos said:
Hallo again, one more question, is it possible that I have flashed a modem that is capable of 4g but in bandwith that my provider in Greece doen't support?
Click to expand...
Click to collapse
I don't think so. If you've flashed back to stock with a KDZ/TOT, then you're golden.
Who is your Grecian provider? What are your current APN settings?

culot said:
I don't think so. If you've flashed back to stock with a KDZ/TOT, then you're golden.
Who is your Grecian provider? What are your current APN settings?
Click to expand...
Click to collapse
My Greek provider is named Cosmote and my APN settings are the following
Name Cosmote Internet
APN internet
MCC 202
MNC 01
APN type default
Hope this tells you something, looking forward to replying me :

tzamakos said:
My Greek provider is named Cosmote and my APN settings are the following
Name Cosmote Internet
APN internet
MCC 202
MNC 01
APN type default
Hope this tells you something, looking forward to replying me :
Click to expand...
Click to collapse
Did you find your e986 Greek stock image yet? Just curious. I swear it sounds like a hardware problem though. Dunno.

culot said:
Did you find your e986 Greek stock image yet? Just curious. I swear it sounds like a hardware problem though. Dunno.
Click to expand...
Click to collapse
No unfortunately I couldn't find anything, I now flash some 4.4.2 rom from e988 just in case.....

Request advice from the experts on troubleshooting or install stock rom

Hi all,
Would like to thank you in advance in taking your time in reading this post. Its my first time (and post) with the XDA forums. I have a few questions I am not sure if Im doing the correct thing so Im hoping for advice for the experts here in the forum to point me in the right direction.
Technical skills - never flashed a phone before but reading the step by step instructions available in the forums.
A few information with my phone to help with troubleshooting
- Purchased with no warranty overseas because they dont sell it here in the Philippines
- Phone came with the following specs
- Android 8 with Nov 1, 2018 patch
- unlock bootloader
- software channel - retcn
- Build number - OPXS27.109-52-10
- Baseband version - M8988_20207.117.02.41-01.01R NCD
Issue:
1. 4G Network - not working at all on the local network. It seems to be able to go to 4G but cannot make outgoing or incoming phone calls/ text or mobile data.
- troubleshooted by resetting phone, changing apn with no luck. Changing it to 3G only seems to make the phone work to make voicecalls/text and mobile connection
2. Random apps crashing - namely - grab (like uber) and spotify.
- tried resetting the phone (and installed just grab app only after reset but still not working) and cleared partition cache boot mode but still no change.
Proposed solution
- installing a new stock rom - should fix the apps crashing issue and 4g issue
- installing custom rom like lineage (discarded this solution because it will disable audio mods) - i bought the moto mods JBL accessory.
questions:
1. Based on this thread - (https://forum.xda-developers.com/z2-force/how-to/how-to-return-to-stock-sprint-t3694783)
- I wish to install stock rom but Im not sure which rom to use. Do I use USC version based on the phones current build number? - OPXS27.109-52-10 or can I change to a different US carrier like verizon ?(related to next question)
2. Is there anyway to change/fix the carrier frequency so it will start accepting 4g locally here?
- will installing a stock rom with a different carrier (i.e. verizon), will that change baseband and accept other frequencies or will I brick my phone?
- Or hope the stock rom with a different patch will fix it? Ive read in forums it could just be the newer patches that giving me issues. The one available for USC is version OPXS27.109-40-7. Upon checking my local carrier and USC band frequencies, both have 5 band with 850ghz frequency available. So Im beginning to think it could be a software rather than carrier issue
3. Because the phone came with a unlocked bootloader, does that mean I will never receive OTA updates from the stock rom? I will have to manually update it when android 9 comes out?
4. software channel - retcn - does that have to do with anything with baseband or installing stock rom? Does this help in any trouble shooting? Ive seen a few threads in the forums with builds with specific software channel in other threads with specific models xt1789 - 02 or 03 or 06. I dont know if that affects stock roms?
-----------------------------------
Maybe it would also help to show my local 4g frequencies and band number
Smart Band is here below
Frequency Protocol Class Band Number
700MHz FDD-LTE/LTE-A 4G 28
850MHz FDD-LTE/LTE-A 4G 5
1800MHz FDD-LTE/LTE-A 4G 3
2100MHz FDD-LTE/LTE-A 4G 1
2300MHz TDD-LTE 4G 40
Sorry for some newb questions and I welcome any other methods of troubleshooting or suggestions you guys can give me. I feel installing stock rom USC carrier is the solution to the problem after all the research I have done, but would like confirmation first from the experts.
Regards
Rj

On mirror.lolinet.com, 109-52-10 belongs to Retail Apac. The newest rom was uploaded is 109-52-12.
If your unlocked bootloader phone is still running the stock firmware, it will be notified when OTA comes.
I'm using an ATT with carrier unlocked so everything is fine to me. With unlocked carrier, you can use any mobile network if the phone baseband supports.
According to basic theory, if the phone was unlocked bootloader, it can be flashed fw from other variants (but there will be problem for each variant situation). It seems none of us here has done this yet.
- Check your phone model, it's on the right of the charger port.
- Open Phone, and type: *#*#4636#*#*. Choose Phone info. Check the preferred network type. If you can receive sms but cannot send, just update your SMSC number.
Most problems can be solved by flashing the stock fw.
Good luck!!!

Thank you
I didn't even know that site until you pointed it out.
I would be definitely be using the APAC software and try and flash the stock rom. I hope it would work and if not I'll try and flashing the older patch version.
Thank you
Will update you hopefully in a week as soon as I fully understand the details of flashing.

Radioband Issue, RETCN and Stockrom app Fix
mr_5kool said:
On mirror.lolinet.com, 109-52-10 belongs to Retail Apac. The newest rom was uploaded is 109-52-12.
If your unlocked bootloader phone is still running the stock firmware, it will be notified when OTA comes.
I'm using an ATT with carrier unlocked so everything is fine to me. With unlocked carrier, you can use any mobile network if the phone baseband supports.
According to basic theory, if the phone was unlocked bootloader, it can be flashed fw from other variants (but there will be problem for each variant situation). It seems none of us here has done this yet.
- Check your phone model, it's on the right of the charger port.
- Open Phone, and type: *#*#4636#*#*. Choose Phone info. Check the preferred network type. If you can receive sms but cannot send, just update your SMSC number.
Most problems can be solved by flashing the stock fw.
Good luck!!!
Click to expand...
Click to collapse
Just giving people update incase anyone is interested. I decided to follow this guide Step E (reflashing back to stock). It worked perfectly for me.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
As you guys know the original Build number was OPXS27.109-52-10. It turns out that was meant for model XT1789-06. It wouldnt be a big deal except my model that arrived was for XT1789-05
Regardless I followed the instructions and installed the latest firmware for OPSC27.109-52-14 for XT1789-06 (https://mirrors.lolinet.com/firmware/moto/nash/official/RETAPAC/)
Installation went fine and all the apps crashing issues went away. However 4G still didnt work.
I decided to see if installation the latest build for XT1789-05 under the link below would help.
https://mirrors.lolinet.com/firmware/moto/nash/official/RETAIL/
It felt more stable, apps not crashing, moto mods still working, and I was able to get get 4G working for internet and sms however phonecalls (both outgoing and incoming) still didnt work. 3G seems to be still stable and working fine at the moment in the Philippines. (note: I have updated APN)
I have decided to leave it alone as I got half my problem sorted (apps crashing) and moto mods still working. Can live without 4G as its mostly connected to WIFI at home and occasionally going out. Crashing apps was more important win for me.
Maybe once Android 9 officially comes out for the phone, it may fix the issue.
I have explored the option of changing the radioband but I heard of nightmares for some users when they switched to USA. I dont know what will happen if I switch to Australia radioband. (i left it to automatic at this time).
Maybe if someone else found the solution, would be happy to try it out.

I'm sorry for you when you still have some problems. My friends mostly use Z2F form T-mobile and Sprint. ATT and Verizon are less. But they work well for all functions.
There's another way you can try. It's the method for dual sim. For eg, you've a Sprint one. You modded the hardware and the 2nd SIM slot is now available. But current Sprint fw only supports single SIM. You can download a dual sim fw, extract it and copy-replace the modem from Sprint fw to dual sim one (I dont remember exactly what modem should keep, sorry). Then, flash the combination fw and the phone runs with dual sim. You can try a stable system and retcn modem or vice versa.

mr_5kool said:
I'm sorry for you when you still have some problems. My friends mostly use Z2F form T-mobile and Sprint. ATT and Verizon are less. But they work well for all functions.
There's another way you can try. It's the method for dual sim. For eg, you've a Sprint one. You modded the hardware and the 2nd SIM slot is now available. But current Sprint fw only supports single SIM. You can download a dual sim fw, extract it and copy-replace the modem from Sprint fw to dual sim one (I dont remember exactly what modem should keep, sorry). Then, flash the combination fw and the phone runs with dual sim. You can try a stable system and retcn modem or vice versa.
Click to expand...
Click to collapse
Nothing to be sorry about, actually really grateful for your input.
Already had a big win by:
1. flashing for the first time ever to stock rom and not bricking my phone in the process
2. all apps are now working
3. moto mods are working
4. alternative solution to 4g issue is available
Just letting you know the my variant already is on dual sim, and I was pretty sure the modem was wiped and reinstalled when I reflashed back to stock. I did find another thread of similar issue. Only solution was really to either change to 3G or fix APN.
https://forums.lenovo.com/t5/Moto-Z...ing-Incoming-and-outgoing/td-p/4068998/page/2
One user commented it could be a carrier issue. (see below)
-------
07-13-2018 08:41 AM
Hello, guys.!
I've been following this inquiry very close and I've arrived into a very accurate conclusion:
1. This is not a device problem! Motorola devices are not the problem. I've found that Samsung and Huawei devices also have the same problems.
2. This is definitely about service provider network. In my investigation, AT&T is the one having this issue alone.
3. This issue happens only in certain Mexican areas. For example, in Monterey this happens. I went to Chihuahua and CD Juarez just last 3 days and I was able to use 4G and calls without problems.
4. Based on the idea that only happens in certain areas at certain networks, I can only concluded that happens to certain devices as well. Brands, perhaps, as unlocked iPhone does not present this issue.
------
It could be something to do with Volte 4G calls. It has been disabled for the Xforce 1789-05 european models.
I think waiting to Android 9 may be my best solution though I may start try to start troubleshooting and focusing on simcards to see if 4g will work with other carriers.

I've got an ATT Flipout. I could make call and sms normally. But the network could only rise to E+, cannot be up to 3G (several years ago). The problem was phone hardware. The baseband was only available for US.
Z2F was the flagship, so its modem supported many 4G band for other regions.
As you mentioned, I think you should find out what carrier's band would suit your Z2F. Luckily, all Z2F variants have our bands.
Good luck, guy! And hope you'll give us good news!

You have the (05) dual sim variant correct? You're also in the Philippines right? If you look at this link you'll see all the bands supported for your variant, also you can check carriers in your region to see what bands they are using.
If you look carriers in Philippines like Smart you can see what bands they use.
A comparable carrier is Claro in Brazil.
They use the same bands on a GSM network. I would assume that Retail firmware would open those bands, but I'm not 100% sure and maybe the firmware you flashed doesn't. I do see firmware for RETBR (retail Brazil) and I know that (05) variants are used there. So maybe flashing a retbr firmware will open the bands needed since Brazil and Philippines use some of the same bands. I'm not 100% sure on this, it's just my best guess. You're welcome to verify the info linked and do what you will. I'd think the worst case scenario would be borking your imei and having to blankflash, but those tools are around here as well and so long as you DO NOT relock your bootloader you'll find that it is pretty hard to actually brick this phone. That's the best I can come up with to help.

Thank you
41rw4lk said:
You have the (05) dual sim variant correct? You're also in the Philippines right? If you look at this link you'll see all the bands supported for your variant, also you can check carriers in your region to see what bands they are using.
If you look carriers in Philippines like Smart you can see what bands they use.
A comparable carrier is Claro in Brazil.
They use the same bands on a GSM network. I would assume that Retail firmware would open those bands, but I'm not 100% sure and maybe the firmware you flashed doesn't. I do see firmware for RETBR (retail Brazil) and I know that (05) variants are used there. So maybe flashing a retbr firmware will open the bands needed since Brazil and Philippines use some of the same bands. I'm not 100% sure on this, it's just my best guess. You're welcome to verify the info linked and do what you will. I'd think the worst case scenario would be borking your imei and having to blankflash, but those tools are around here as well and so long as you DO NOT relock your bootloader you'll find that it is pretty hard to actually brick this phone. That's the best I can come up with to help.
Click to expand...
Click to collapse
Your correct, its the dual sim 05 variant. I flashed the retail and I do get LTE data. It just the LTE wont work on 4G. So I dont think its purely a band issue because based on your link I have 3 supported LTE bands with the smart network. Its possible its something to do with carrier communicating with the phone. (APN? Volte?)
Question: will flashing a retbr on a retcn cause issue? Does software channel matter? Maybe I can give it a go, but my wife (who i gave the phone to) has been pretty happy with it. I dont think she wants another wipe on her phone. (i think i already reformatted at least 5 times already)

Update
I found this thread with moto z play.
Maybe this will work? It a method to open all baseband channels.
https://forum.xda-developers.com/moto-z-play/how-to/enabling-basebands-mzp-qualcomm-phone-t3684962

harkoliar said:
I found this thread with moto z play.
Maybe this will work? It a method to open all baseband channels.
https://forum.xda-developers.com/moto-z-play/how-to/enabling-basebands-mzp-qualcomm-phone-t3684962
Click to expand...
Click to collapse
I don't know about all that, looks like a recipe for trouble. Are you able to make or receive voice calls? FYI you can go to apn settings, click the 3-dot menu and reset to default. That should pull your apn info from your sim so you should be good to go apn wise.

There was an old method called RadioComm. It used to unlock carrier for Razr HD (and maybe others Motorola phones). But it is more danger than flashing fw.
On my Verizon phones, no APN profile was showed. But on ATT Z2F, APN was automatically set (and showed) for each carrier.

Inbound and outbound calls affected
41rw4lk said:
I don't know about all that, looks like a recipe for trouble. Are you able to make or receive voice calls? FYI you can go to apn settings, click the 3-dot menu and reset to default. That should pull your apn info from your sim so you should be good to go apn wise.
Click to expand...
Click to collapse
Unfortunately still a no go.
I have reset the network settings and used default apn as per your suggestion. I even copied settings from another phone using same carrier and used different calling apps. It's weird but when at 4g
1. Text work
2. Data works
3. Inbound and outbound phone calls doesn't work
Swap to 3g everything works
I'm still trying to convince my wife if I should flash to retbr.

harkoliar said:
Unfortunately still a no go.
I have reset the network settings and used default apn as per your suggestion. I even copied settings from another phone using same carrier and used different calling apps. It's weird but when at 4g
1. Text work
2. Data works
3. Inbound and outbound phone calls doesn't work
Swap to 3g everything works
I'm still trying to convince my wife if I should flash to retbr.
Click to expand...
Click to collapse
Well if everything works on 3g then it sounds like your bands are fine. Sounds more like a volte issue. 4g works, 3g works, calling works, it's just no calls when 4g is on. Are you using an old sim? Have you tried the sim in another phone to see if you experience the same problems with 4g? Some carriers use different sim for different services. What is your preferred network type set to? If it's exclusively LTE, try setting it to LTE/GSM. It sounds more like a sim issue, setting issue, or maybe a registration issue.

41rw4lk said:
Well if everything works on 3g then it sounds like your bands are fine. Sounds more like a volte issue. 4g works, 3g works, calling works, it's just no calls when 4g is on. Are you using an old sim? Have you tried the sim in another phone to see if you experience the same problems with 4g? Some carriers use different sim for different services. What is your preferred network type set to? If it's exclusively LTE, try setting it to LTE/GSM. It sounds more like a sim issue, setting issue, or maybe a registration issue.
Click to expand...
Click to collapse
I dont think its a old sim issue because its only a year old. But I am getting another simcard from another local network to test it out.
Will update with details.

Hello harkoliar, it looks like both you and I share the exact problem. And best of all, or worst depending on how you view it, I am in Malaysia with the same problems, Grab keeps crashing, among other apps just failing to work period.
Software Channel reads RETCN. 05 phone running an 06 firmware.
I noticed you tried to flash a RETAIL firmware, may I know which was the file you used, was it OPXS27.109-34-21?
I don't have much problems with the connectivity and using 4G. Perhaps it may be a difference between telcos in Malaysian and the Philippines.
Oh... And I bought mine from Lazada, where did you get yours. LOL

frozero said:
Hello harkoliar, it looks like both you and I share the exact problem. And best of all, or worst depending on how you view it, I am in Malaysia with the same problems, Grab keeps crashing, among other apps just failing to work period.
Software Channel reads RETCN. 05 phone running an 06 firmware.
I noticed you tried to flash a RETAIL firmware, may I know which was the file you used, was it OPXS27.109-34-21?
I don't have much problems with the connectivity and using 4G. Perhaps it may be a difference between telcos in Malaysian and the Philippines.
Oh... And I bought mine from Lazada, where did you get yours. LOL
Click to expand...
Click to collapse
Same Lazada. Lol. We must have gotten from the same supplier.
Your right, I installed OPXS27.109-34-21. Worked like a charm after that. Please follow the steps provided in the guide - Step E.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
note: be mindful just what version of android your using. Im assuming its also android 8 like mine. If its currently Android 7, i heard its best to install the android 7 rom first then upgrade to 8. You can tell by the versions.
Another user also having the same problems and reinstalled the latest Retail ROM for XT1789-05 - latest version, worked for him as well
https://forum.xda-developers.com/z2-force/help/internet-issue-apps-xt1789-05-t3924795/page2
Please let us know how you go.

harkoliar said:
Same Lazada. Lol. We must have gotten from the same supplier.
Your right, I installed OPXS27.109-34-21. Worked like a charm after that. Please follow the steps provided in the guide - Step E.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
note: be mindful just what version of android your using. Im assuming its also android 8 like mine. If its currently Android 7, i heard its best to install the android 7 rom first then upgrade to 8. You can tell by the versions.
Another user also having the same problems and reinstalled the latest Retail ROM for XT1789-05 - latest version, worked for him as well
https://forum.xda-developers.com/z2-force/help/internet-issue-apps-xt1789-05-t3924795/page2
Please let us know how you go.
Click to expand...
Click to collapse
Just finished flashing! So far so good, installing apps as we speak! Super excited!
Was your seller named Aukey? I left them a stinker of a review, lol.
Thank you so much for your experience and detailed breakdown of what you did to get right with your, now, wife's phone. :laugh::fingers-crossed::victory:

Different seller but same source most likely
Different seller but same source most likely.
Happy to help and hopefully that did fix all your app problems. :good:
Still credits and thanks to the actual guys who did the guide.

frozero said:
Just finished flashing! So far so good, installing apps as we speak! Super excited!
Was your seller named Aukey? I left them a stinker of a review, lol.
Thank you so much for your experience and detailed breakdown of what you did to get right with your, now, wife's phone. :laugh::fingers-crossed::victory:
Click to expand...
Click to collapse
AUKEY owns coolicool. Same supplier keeps making the same mistake