Develop Bugs

[Q] Stupid Question abot GNEX from Korea

Im Active duty military so i end up where every they send me. I had to purchase a local phone since i will be in korea for the next year. I chose the Samsung Galaxy Nexus as my phone. i wanted to know if i can still root this phone and flash a custom rom with out messing up the phone.
The model Number is SHW-M420K.
Its running ISC 4.0.1.
The boot loader says the Board name: tuna Rev 9.
The base band is: M420KRKK7.
Kernel Version is: [email protected] #1.
Build Number ITL41F.M420KREK24.
Please Let me Know Thank You

This is not a stupid question.
The simple answer is that the M420K is the KT Telecom version of the HSPA+ Galaxy Nexus, internationally known as I9250 but has bigger battery. So, yes. You can do all of the above.
For further info contact impala.cap2ya by PM or email him on [email protected]

samizad said:
This is not a stupid question.
The simple answer is that the M420K is the KT Telecom version of the HSPA+ Galaxy Nexus, internationally known as I9250 but has bigger battery. So, yes. You can do all of the above.
For further info contact impala.cap2ya by PM or email him on [email protected]
Click to expand...
Click to collapse
Almost the same question though it might be repetitive or stupid. I have that HSPA+(3G) version of KT Telecom GN coming a few days later. Is that the GSM GNex? That is, will all the applications, custom ROMs and firmwares for GSM version in XDA going to work with my phone? I checked out both forums for GSM and CDMA version since all Korean phones use CDMA network, but it seemed like CDMA forum here was all about LTE version serviced by Verizon.

team56th said:
Almost the same question though it might be repetitive or stupid. I have that HSPA+(3G) version of KT Telecom GN coming a few days later. Is that the GSM GNex? That is, will all the applications, custom ROMs and firmwares for GSM version in XDA going to work with my phone? I checked out both forums for GSM and CDMA version since all Korean phones use CDMA network, but it seemed like CDMA forum here was all about LTE version serviced by Verizon.
Click to expand...
Click to collapse
Yes. HSPA+ =GSM
Sent from my Galaxy Nexus using xda premium

team56th said:
Almost the same question though it might be repetitive or stupid. I have that HSPA+(3G) version of KT Telecom GN coming a few days later. Is that the GSM GNex? That is, will all the applications, custom ROMs and firmwares for GSM version in XDA going to work with my phone? I checked out both forums for GSM and CDMA version since all Korean phones use CDMA network, but it seemed like CDMA forum here was all about LTE version serviced by Verizon.
Click to expand...
Click to collapse
Basically, the Korean Galaxy Nexus is not CDMA. It is GSM and works in Korea using the 3G WCDMA. You can confirm this by switching off the 3G in the Wireless Settings "Use only 2G networks" and you will see that you lose the phone signal and can't make any calls.

samizad said:
Basically, the Korean Galaxy Nexus is not CDMA. It is GSM and works in Korea using the 3G WCDMA. You can confirm this by switching off the 3G in the Wireless Settings "Use only 2G networks" and you will see that you lose the phone signal and can't make any calls.
Click to expand...
Click to collapse
would a pentaband GSM model work in Korea if brought from the u.s./Europe?
If so, how difficult is it to get a prepaid or temporary sim card when visiting?
Sent from my Galaxy Nexus using Tapatalk

naerok said:
would a pentaband GSM model work in Korea if brought from the u.s./Europe?
If so, how difficult is it to get a prepaid or temporary sim card when visiting?
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
Yes.
Prepaid or temporary sim card is pretty hard to come by cheaply if you want data.

Yes. Forget prepaid sim if you want 3G data.
Getting set up with a phone in Korea is a real pain for expats.
Sent from my Galaxy Nexus using xda premium

[solved.. won't work] T-Mobile 3G/4G on AT&T SGH-I747

I've got an unlocked AT&T Galaxy SIII, and I only get Edge for my data connection. Do I need to flash a T-Mobile radio? APN settings look okay, as far as I can see.
Also, can I flash a T-Mobile ROM and use Wifi calling, or is that asking too much?
I searched and couldn't find anyone asking these questions in the Q&A forum....

there are already like 3 threads below this one concerning the 3g/4g topic on a att sg3 working on tmobile. No it will not work because att sg3 does not support the aws tmobile frequencies. you will only be able to get edge. NOW if it were a tmobile sg3 on att then it would work.

All the threads I could find in this form on my search went the other way: T-Mo phone on AT&T.
Does anyone actually know whether a T-Mobile modem on an AT&T phone would work or not? I looked at the main board in my phone, and it's labelled with both SGH-I747 and SGH-T999, which makes me think the internals are fully identical.

I'd like to know this too! I also have an AT&T Galaxy SIII and was seriously considering moving to T-Mobile because of the new unlimited data plan they were going to start offering on 9/5. I had also looked through this forum, and could only find questions of the situation the other way around, T-Mob GSIII phone on AT&T network.
Basically, was wondering:
- is there a hardware limitation that APN settings and/or installing a new modem will not get me good data speeds?
- would I need to burn a new modem?
- I'm assuming at minimum I'd need new APN settings, and am assuming T-Mobile would be able to help with that. Right?
Thanks, really interested in being able to do this!
---------- Post added at 03:00 PM ---------- Previous post was at 02:13 PM ----------
Hey oblib - looks like there's an unfortunate hardware limitation we won't be able to get around: http://forum.xda-developers.com/showthread.php?t=1771021

oblib__ said:
All the threads I could find in this form on my search went the other way: T-Mo phone on AT&T.
Does anyone actually know whether a T-Mobile modem on an AT&T phone would work or not? I looked at the main board in my phone, and it's labelled with both SGH-I747 and SGH-T999, which makes me think the internals are fully identical.
Click to expand...
Click to collapse
Where did you see that the boards were labelled the same?
AFAIK, the radio's are different and flashing a T-mobile modem could possibly brick your device. It would be much easier to buy a T999 and use it on T-Mobile (it'll even work on AT&T 3G if you want to switch back, no LTE though).

The SoCs are different. Flashing a T-Mobile modem will not give you T-Mobile HSPA.

Looks like I didn't take any pictures of that side of the phone while I had it open, and I'm not eager to pop it open again. It definitely listed both models on the PCB. If I'm remembering correctly, it's on the same side as the SIM and SD card slots, so it's just matter of removing the back plate to see it, no more disassembly than that.
joshnichols189 said:
The SoCs are different. Flashing a T-Mobile modem will not give you T-Mobile HSPA.
Click to expand...
Click to collapse
Do you have part numbers for the two? According to wikipedia, they are the same Snapdragon S4 MSM8960. I just find it hard to believe that they would be different, though if they have the same pinout, that would explain the markings on my PCB.

This has been rehashed countless times. They are not the same phone. If the phones were the same, people would not be in here asking if they were the same. The MSM8960 comes in more than one flavor, with different modem parts. Yes, the CPU's are the same, but the MODEMS ARE DIFFERENT. It is an S4 Qualcomm part that comes in many different configurations. Instead of just reading until you get to some information that reinforces your preconceived notion, try reading a little further into the links at the bottom of the page and elsewhere. Seriously, if you really really don't think that Qualcomm would make different versions of the same chip, or configure them differently for the hundreds of different customer requirements, then fine, don't believe me, but it defies logic. Sorry about being an ass.

oblib__ said:
Looks like I didn't take any pictures of that side of the phone while I had it open, and I'm not eager to pop it open again. It definitely listed both models on the PCB. If I'm remembering correctly, it's on the same side as the SIM and SD card slots, so it's just matter of removing the back plate to see it, no more disassembly than that.
Do you have part numbers for the two? According to wikipedia, they are the same Snapdragon S4 MSM8960. I just find it hard to believe that they would be different, though if they have the same pinout, that would explain the markings on my PCB.
Click to expand...
Click to collapse
The T-Mobile version uses an MSM8260a. This SoC is the Krait with an adreno 225 GPU and no LTE. The MSM8960 has all three.
Sent from my SGH-T999

joshnichols189 said:
The T-Mobile version uses an MSM8260a. This SoC is the Krait with an adreno 225 GPU and no LTE. The MSM8960 has all three.
Sent from my SGH-T999
Click to expand...
Click to collapse
Thanks for the useful response. For those looking for even more detail, here's a link: http://www.qualcomm.com/sites/default/files/common/snapdragon-specs-06.07.12.pdf
According to that the MSM8960 (chip in I747?) has a "World Mode" modem, while the MSM8260a has a UMTS modem.
Edit: Ah, and I see both of you have answered this question before, which I would have found if I searched on MSM8260a. The threads have been dead for over a week, so I'm not surprised I missed them, but thanks for answering the same questions again.

T-Mobile HSPA not support i747 right now.

oblib__ said:
I've got an unlocked AT&T Galaxy SIII, and I only get Edge for my data connection. Do I need to flash a T-Mobile radio? APN settings look okay, as far as I can see.
Also, can I flash a T-Mobile ROM and use Wifi calling, or is that asking too much?
I searched and couldn't find anyone asking these questions in the Q&A forum....
Click to expand...
Click to collapse
T-Mobile uses a frequency for their 3g and 4g network that only T-Mobile branded phones have. Any other GSM phone will never get 3g or 4g on T-Mobile network unless it supports the T-Mobile band, which I believe is 1700MHz. It's limited by hardware. Nothing you can do to the phone will give you the 3g/4g you have to have a T-Mobile branded device.
Sent from my SGH-T999 using Tapatalk 2

elesbb said:
T-Mobile uses a frequency for their 3g and 4g network that only T-Mobile branded phones have. Any other GSM phone will never get 3g or 4g on T-Mobile network unless it supports the T-Mobile band, which I believe is 1700MHz. It's limited by hardware. Nothing you can do to the phone will give you the 3g/4g you have to have a T-Mobile branded device.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
Not completely true. Since The Galaxy SII and the Galaxy Note (AT&T) have software radios, you can flash a radio from the TMO GSII and get 4G on TMO. I was running mine and many customers of mine like that for months until i switched phones.

Making your AT&T i747 GS3 work on T-Mobile 4G (without rooting)
oblib__ said:
I've got an unlocked AT&T Galaxy SIII, and I only get Edge for my data connection. Do I need to flash a T-Mobile radio? APN settings look okay, as far as I can see.
Also, can I flash a T-Mobile ROM and use Wifi calling, or is that asking too much?
I searched and couldn't find anyone asking these questions in the Q&A forum....
Click to expand...
Click to collapse
It works fine for me, the area i'm in does not support 4G on the 1900MHz frequency so I can definitely confirm my stock non-rooted AT&T i747 galaxy SIII is working on T-Mobile USA's 4G data network. I've uploaded a video to youtube of how to get this to work, should also work for the AT&T i317 note II as well. I can't post links on here I guess so just type my youtube username and search my videos.
youtube username: 6italia0
Video title: How to get AT&T gs3 i747 to work with Tmobile 4G (no root!)

6italia0 said:
It works fine for me, the area i'm in does not support 4G on the 1900MHz frequency so I can definitely confirm my stock non-rooted AT&T i747 galaxy SIII is working on T-Mobile USA's 4G data network. I've uploaded a video to youtube of how to get this to work, should also work for the AT&T i317 note II as well. I can't post links on here I guess so just type my youtube username and search my videos.
youtube username: 6italia0
Video title: How to get AT&T gs3 i747 to work with Tmobile 4G (no root!)
Click to expand...
Click to collapse
I think you just got it to work because T-Mobile launched 1900Mhz 4G starting 2013?

doutlaw said:
I think you just got it to work because T-Mobile launched 1900Mhz 4G starting 2013?
Click to expand...
Click to collapse
ive got a friend whos got this working, im gonna try and let you know!

I just picked up a t-mobile sim on ebay for a florida trip in a few weeks. Im hoping to get the $3 a day plan for my unlocked Galaxy s3 and hoping to get 1900mhz 4g service.
Sent from my SGH-I747M using Tapatalk 2

Same with the s2 flash an tmobile radio combo on the skyrocket and get 4g but with the s3 might be different
Sent from my SGH-T999 using xda app-developers app

IT CAN WORK (see details!)
elesbb said:
T-Mobile uses a frequency for their 3g and 4g network that only T-Mobile branded phones have. Any other GSM phone will never get 3g or 4g on T-Mobile network unless it supports the T-Mobile band, which I believe is 1700MHz. It's limited by hardware. Nothing you can do to the phone will give you the 3g/4g you have to have a T-Mobile branded device.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
This is NOT TRUE, please be careful when making such "absolute" statements -- I just got a ATT i747 from craigslist, and it DOES work with the $30 Walmart plan - on 4G and LTE (depending on location).
The TRUE ANSWER IS -- IT DEPENDS -- if you live in an area that was recently upgraded to LTE (in my area was 02/13), you can get LTE/4G since t-mobile added support for it on 700 MHz (band 4) AWS (unverified - source: youtube video named "Tmobile 4G on att i747 gs3 data fix". Sorry I am not allowed to post web-links yet).
Anyway, I DO get 4G/LTE, I guess I was lucky

momchi said:
This is NOT TRUE, please be careful when making such "absolute" statements -- I just got a ATT i747 from craigslist, and it DOES work with the $30 Walmart plan - on 4G and LTE (depending on location).
The TRUE ANSWER IS -- IT DEPENDS -- if you live in an area that was recently upgraded to LTE (in my area was 02/13), you can get LTE/4G since t-mobile added support for it on 700 MHz (band 4) AWS (unverified - source: youtube video named "Tmobile 4G on att i747 gs3 data fix". Sorry I am not allowed to post web-links yet).
Anyway, I DO get 4G/LTE, I guess I was lucky
Click to expand...
Click to collapse
You do realize you resurrected an old thread, and responded to a post that was made a year ago??? Long before LTE rolled out. At the time of his post, he was 100% correct.
I dont think this is the intended way to get your 10 posts btw. There are plenty of recent issues to respond to. Thx.
Sent from my SGH-T999 using xda premium

[Q] 3G/GPRS/EDGE not working on AT&T Galaxy S3 SGH-I747

Hello Everyone
I looked in the forums didn't find the solution so i wanted to ask my question here and I hope someone will come with help
my problem is I have a Samsung Galaxy S3 from AT&T .. I pay for unlimited 3G data but I'm not getting it .. I asked the AT&T dealer they told me it might be only reads LTE 4G data thats why .. but i think there's something AT&T to make money from costumers anyway .. How can I make my samsung galaxy s3 connect me through 3G, GPRS or EDGE .. and Thanks for helping me

If you are looking to control whether to use 2g, 4g, or 4glte:
http://forum.xda-developers.com/showthread.php?t=2116346
You need to remove the restriction with the *#197328640# number and submenus,
then change the radio under the *#2263# number and its submenus.
Sent from my SAMSUNG-SGH-I747 using xda premium

How to change the radio in that menu ??? which one to choose

shortydoggg said:
If you are looking to control whether to use 2g, 4g, or 4glte:
http://forum.xda-developers.com/showthread.php?t=2116346
You need to remove the restriction with the *#197328640# number and submenus,
then change the radio under the *#2263# number and its submenus.
Sent from my SAMSUNG-SGH-I747 using xda premium
Click to expand...
Click to collapse
SERVICE MENU:
dial:
*#197328640#
Enter code to remove Restriction: 11865
then dial *#2263#
and you should be able to change the signal from there.

Hi,
I bought a phone in the US thinking its samsung s3 i9300 but discovered its s3 i747. I'm using the phone in Kenya but it cannot connect to WCDMA, only connects to GSM mode so internet access is very slow!! Any help??

Your carrier probably does not use the same frequencies supported by the phone.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

DocHoliday77 said:
Your carrier probably does not use the same frequencies supported by the phone.
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Click to expand...
Click to collapse
Hi,
I'm using the phonebfor voice calls and texts. I've also checked the frequencies and my carrier uses 2100 for 3g which the phone supports!! The phone status says modified and displays model as i9300 but download mode displays model as i747.
Any further advice??

Oh boy....another Franken-Phone! These things are getting too common. Wish I knew where they were coming from....
Install Terminal Emulator from the store. Open and enter this:
getprop ro.bootloader
Tell me what this returns. Also, what is your current baseband?
Sent from my SAMSUNG-SGH-I747 using Tapatalk

Hi, i got the same problem as the other folk.
DocHoliday77 said:
Oh boy....another Franken-Phone! These things are getting too common. Wish I knew where they were coming from....
Install Terminal Emulator from the store. Open and enter this:
getprop ro.bootloader
Tell me what this returns. Also, what is your current baseband?
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Click to expand...
Click to collapse
I bought samsung galaxy s3 sgh-i747m from canada now im in Tanzania, it only support GSM (2g) network cant go for 3g even though on the network mode option i chose LTE/WCDMA/GSM if i change to another mode it wont support. I have tried to upgrade it from ver. 4.3 to 4.4.2 but still the same problem. Any help please...

bigbwoy said:
I bought samsung galaxy s3 sgh-i747m from canada now im in Tanzania, it only support GSM (2g) network cant go for 3g even though on the network mode option i chose LTE/WCDMA/GSM if i change to another mode it wont support. I have tried to upgrade it from ver. 4.3 to 4.4.2 but still the same problem. Any help please...
Click to expand...
Click to collapse
These are the frequencies for the sgh-i747/m: 2G - GSM 850 / 900 / 1800 / 1900, 3G - HSDPA 850 / 1900 / 2100, and 4G - LTE 700 MHz Class 17 / 2100
Does your cell carrier support the 3G frequencies?

Yes it supports
audit13 said:
These are the frequencies for the sgh-i747/m: 2G - GSM 850 / 900 / 1800 / 1900, 3G - HSDPA 850 / 1900 / 2100, and 4G - LTE 700 MHz Class 17 / 2100
Does your cell carrier support the 3G frequencies?
Click to expand...
Click to collapse
Yes it supports,,, GSM 900/1800, 3G 900/2100

For 3g, it doesn't look like the i747m supports the right frequencies.

Omg!!!
audit13 said:
For 3g, it doesn't look like the i747m supports the right frequencies.
Click to expand...
Click to collapse
So u wanna tell me it wont support 3g only 2g

Looks like 3g is not supported because the s3 does 850/1900/2100 and you need 900/2100. The s3 is missing the 900.
The international s3 (gt-i9300) looks like it will give you 3g: http://www.gsmarena.com/samsung_i9300_galaxy_s_iii-4238.php

both the i747 and i747m support 3G in africa. I also came across the "refurbished" ones that have a i9300 sticker at the back but in reality are i747 and i747m.
They are both fixable issues (working on 2G only). Needs flashing and then repair.
Contact me by pm if interested

Same problem here
I ran into the same problem!! What's the fix? I opened the phone to see the model number on the motherboard. It is Sghi747. But the sticker under the battery shows I have GT-I9300.
I am not able to connect to 3G. Only 2G.

baptenda said:
I ran into the same problem!! What's the fix? I opened the phone to see the model number on the motherboard. It is Sghi747. But the sticker under the battery shows I have GT-I9300.
I am not able to connect to 3G. Only 2G.
Click to expand...
Click to collapse
Find someone who fixes phones locally, and ask them to repair NVM. And also to flash it with the correct flash file

Your suggestion did work. I appreciate your quick replies and kindness. Be blessed. You saved my Samsung Galaxy S3. It now shows 4G icon , typical of At&t S3 variant. I am enjoying the high speed Internet. Thanks again.
Sent from my SGH-I337M using XDA Free mobile app

shortydoggg said:
SERVICE MENU:
dial:
*#197328640#
Enter code to remove Restriction: 11865
then dial *#2263#
and you should be able to change the signal from there.
Click to expand...
Click to collapse
how to put code 11865 after dailing *#197328640#

burraqmobile said:
how to put code 11865 after dailing *#197328640#
Click to expand...
Click to collapse
It's a code which only represents the numbers you hit on each menu. It's the numbers from the menus written together. You hit 1 on the first menu, 1 on the second menu...up to hit 5 on the last menu. 11865 is just written as a code for abbreviation.

[Q] WIND - Rogers incompatible frequency

I feel sure somebody must have asked this before, but I used the search function and couldn't find anything.
I've heard that WIND phones (SGH-T999V) are modified to their own frequency, so that you can't use a WIND phone on any other networks. But I figure if the hardware is the same, then you should be able to mod your phone to change the firmware right? And thus be able to use those other frequencies.
So where does the truth lie? For example if I had a phone I bought from WIND, and theoretically the hardware supported Rogers' frequencies, could I use Rogers if I switch to Rogers? And what is the case in terms of hardware support?
Thanks in advance

Wind and Rodgers are going to be similar to T-Mobile vs AT&T. I'm sure you can probably use the phone, but their data networks operate on different frequencies, meaning you might get 2g at best, maybe if you're really lucky you'd get 4g but it just depends. Check what frequency the phone operates on, then find what your preferred carrier uses, and if they match for 4g, then you should be fine. But it's not just Wind. Videotron, Mobilicity, and another I can't remember all use the T999V with the same firmware, so those carriers should all be compatible.
I imagine the same is true for Rodgers, Telus, and whatever else is covered in AT&T forums. You'd have to ask there to be sure though.
Sent from my SGH-T999V using Tapatalk 4
---------- Post added at 08:50 PM ---------- Previous post was at 08:49 PM ----------
Oh, and if you use a T999V on Rogers you have to be unlocked, and expect little, if any support from the carrier on hardware issues.
Sent from my SGH-T999V using Tapatalk 4

[Q] Lenovo Z90-7 (VIBE SHOT) 4G UK HELP PLEASE?

Hi guys,
I have just bought this phone and flashed it with the latest firmware Android 5.1 as per the post on this forum. I am now very worried because my phone only seems to be connectiong to 2.4ghz network instead of 5ghz. Also I cannot get mobile data working.

What ROM/kernel did you flash? Many ROMs run 5.1.x
Sent from my Nexus 6 using Tapatalk

Rep7ile said:
What ROM/kernel did you flash? Many ROMs run 5.1.x
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Hi I used this rom Z90a40_USR_S118_1505272046_Q2020131.4_ROW_qpst
which was mentioned here on the forum as the best for Android 5.1

Hey man, I've done some research and it seems your ROM/phone should support LGT(4G). I would highly suggest completely wiping your phone, reflash ROM/ Gasps/ kernel (if you have one) and see if the issue persists
Sent from my Nexus 6 using Tapatalk

The seller says I can send the item back for a full refund but unsure if he will give me a refund as I've changed the ROM to 5.1 The worst thing would be sending the device back to China

Okay, have you tried manually setting your APN? Fallow the steps below and findnthe APN settings online for your carrier, let me know what happens.
Many users have told me their 3G/4G LTE data network connection is broke after installing a custom ROM. *Well, in most of these cases, it can easily be fixed by manually setting the APN (Access Point Name). *This applies to any GSM networks such as*AT&T or T-Mobile. *For CDMA networks like Sprint or Verizon, they also use APNs but you don’t have to set them and should work out of the box.
Every carrier uses its own APN Settings to get its 3G/4G LTE network working on an Android smartphone or tablet device. *Now, these APN settings are usually “downloaded” automatically to your*phone*when you insert a SIM card. *BUT, there are times where the APN are not selected automatically OR when the APN settings are not downloaded.
In those instances, your 3G/4G LTE data will not work but that can easily be fixed.
Step 1. First, browse your Settings menu and find the “Access Point Names” menu. *This is usually under “Mobile Network Settings” or “More*mobile Networks or “Mobile Networks” under Settings menu depending on the Android device used.
Step 2. Once you are in the APN Settings menu, first thing you should check it that the APN is on the correct one. *If the correct APN is not checked (sometimes this happens), simply check ON the correct APN for your carrier. *That will make your 3G/4G LTE data working right away
tep 3. There are also times where the wrong APN is listed or there’s simply no APNs listed. *In these rare cases, you can simply add a new APN, hit the “+” button.
Step 4. For APN setting, the “Name” can be anything. *“APN” setting is the most important, usually you only have to fill this out for your phone to work.
For T-Mobile, you can set the “APN” to “fast.t-mobile.com”. *AT&T, you can set “APN” to “phone” or “pta”.
Now setting “APN” will get your data working but you still need to input additional settings to get your MMS working.
ep 5. You can usually Google APN settings for your carrier. *Whether you are in Thailand or in the U.S., simply Google for your APN settings like:
Google “t-mobile APN 4G LTE” for T-Mobile 4G LTE APN settings in the U.S.
Google “True Move APN 3g” for True Move 4G APN settings in Thailand.
Eventually, you should be able to find the full APN settings for your carrier whether you live in Hawaii or on North Pole.
Once you have the correct APN settings, simply input them into your APN settings on the phone
Step 7. Next, make sure to select the new APN Setting you have saved. *Within 5-30 seconds, your phone should start picking up 3G or 4G LTE signals and your data should be working again on the phone.
Sent from my Nexus 6 using Tapatalk

desi112 said:
Hi guys,
I have just bought this phone and flashed it with the latest firmware Android 5.1 as per the post on this forum. I am now very worried because my phone only seems to be working on 3G. When I go into settings and network it only gives me the options to pick a 3G network. I did a lot of research before buying this phone and was assured it would work on 4G within the UK my old phone the Sony Xperia ZR worked on 4G fine. I do have the latest nano sim.
Here are the details of the Lenovo Z90-7 As per GSM Arena
Technology
GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1900 / 2100
4G bands LTE 800 / 1800 / 2100 / 2600 - Lenovo Z90-7
And from my network operator's webpage I get the following info
4G from Tesco Mobile (o2) uses the following network frequencies:
800 MHz (0.8 GHz)
Am I having this problem as I flashed it with new firmware?
Click to expand...
Click to collapse
I believe the phone doesn`t have the LTE 800 frequency.
Search other websites than gsm arena.
That`s why you don`t get 4G.

Hi Friends,
Thanks for the quick replies I really appreciate the help. In regards to the APN settings I've checked these and these seem to be correct.
So it *Should* work EE

Interesting, I was hoping the APN settings were the cause. I'm sorry you couldn't fix your issue. I'm sure you will have better luck with your next device.
Sent from my Nexus 6 using Tapatalk

desi112 said:
Hi Friends,
Thanks for the quick replies I really appreciate the help. In regards to the APN settings I've checked these and these seem to be correct.
Valter84 you are correct I spoke to the seller and he advised that there is a mistake on the listing the phone does not support the LTE 800Mhz frequency.
So it *Should* work in the UK on the network EE which uses Band 3 FDD LTE (1800mhz). I've tried an EE sim and it still does not work at all on 4G.
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Click to collapse
Hi, I have the same trouble as you , anyway I have not flashed my Z90-7 yet. My chinesse seller from Aliexpress claims , that this phone supports all usual LTE frequencies including 800 Mhz.
But I can use here in Czech republic at T mobile provider only 1800 Mhz which covers only Prague and Mlada Boleslav . Rest of our country covers LTE on 800 Mhz only.

vlada.b said:
Hi, I have the same trouble as you , anyway I have not flashed my Z90-7 yet. My chinesse seller from Aliexpress claims , that this phone supports all usual LTE frequencies including 800 Mhz.
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Click to collapse

desi112 said:
vlada.b said:
Hi, I have the same trouble as you , anyway I have not flashed my Z90-7 yet. My chinesse seller from Aliexpress claims , that this phone supports all usual LTE frequencies including 800 Mhz.
Click to expand...
Click to collapse
This seems to be a worldwide problem outside China. It is nothing to do with APN settings, etc.
A company is selling this phone on Amazon USA and they have specifically mentioned 4G does not work in the USA.
I am based in the UK and 4G doesn't work. I have flashed the phone and have now android 5.1 installed on it, but until official EU version of this phone is released we will be stuck with 3G
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Click to collapse

barcomi said:
desi112 said:
This seems to be a worldwide problem outside China. It is nothing to do with APN settings, etc.
A company is selling this phone on Amazon USA and they have specifically mentioned 4G does not work in the USA.
I am based in the UK and 4G doesn't work. I have flashed the phone and have now android 5.1 installed on it, but until official EU version of this phone is released we will be stuck with 3G
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Click to collapse
Guys, just to let you know the phone works 4G on UK EE network, but not on O2.
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Click to collapse

I need help. can't use 5ghz network.
desi112 said:
Hi guys,
I have just bought this phone and flashed it with the latest firmware Android 5.1 as per the post on this forum. I am now very worried because my phone only seems to be connectiong to 2.4ghz network instead of 5ghz. Also I cannot get mobile data working.
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Click to collapse
I can't connecting 5ghz too.
Just only can connecting 2.4ghz.
I can't find 5ghz network in WLAN list.
I succeeded installing the ROM. (use MiFlash tool)
ROM Version: Z90-a40_S118_1505272008_ROW
So, my phone's android version is 5.1
Z90-7 device can't support 5ghz WIFI network? or ROM's problem?
I want to know about this problem's solutions. (I want to use 5ghz wifi network!)
If anybody answer for me, I'll be very grateful.
Thanks for reading.

Chinese markets are deceiving customers
vlada.b said:
Hi, I have the same trouble as you , anyway I have not flashed my Z90-7 yet. My chinesse seller from Aliexpress claims , that this phone supports all usual LTE frequencies including 800 Mhz.
But I can use here in Czech republic at T mobile provider only 1800 Mhz which covers only Prague and Mlada Boleslav . Rest of our country covers LTE on 800 Mhz only.
Click to expand...
Click to collapse
Dear people, wake up, many Chinese markets are deceiving customers by providing them misleading information. LTE bands is one clear example. Chinese LTE bands are diferent and they just flash the device's ROM for multi-language and add Google Play to make it "international version" but it is not. DON'T BUY IT!
I double checked with this company minideal.net which i cannot recommend. The company confirmed full FDD LTE (4G) functionality on following frequency bands: 800/1800/2100/2600MHz. But my smartphone IS NOT WORKING on 800MHz in The Czech Republic because it is only 1800/2100/2600MHz in fact. Within the PayPal Dispute and Claim they completely turned around their statements concerning LTE bands.
Complete tests were made with my network operator provider to rull out other problems. You can easily check that in these comments and in some fair e-shops where they don't twist the truth.

Mydoma said:
Dear people, wake up, many Chinese markets are deceiving customers by providing them misleading information. LTE bands is one clear example. Chinese LTE bands are diferent and they just flash the device's ROM for multi-language and add Google Play to make it "international version" but it is not. DON'T BUY IT!
I double checked with this company minideal.net which i cannot recommend. The company confirmed full FDD LTE (4G) functionality on following frequency bands: 800/1800/2100/2600MHz. But my smartphone IS NOT WORKING on 800MHz in The Czech Republic because it is only 1800/2100/2600MHz in fact. Within the PayPal Dispute and Claim they completely turned around their statements concerning LTE bands.
Complete tests were made with my network operator provider to rull out other problems. You can easily check that in these comments and in some fair e-shops where they don't twist the truth.
Click to expand...
Click to collapse
This is correct, the phone doesn't work on 800MHz. However it should because Qualcom 615 supports 800MHz. the reason it doesn't work is because the modem is probably locked within the ROM. I am hoping once this phone is release european version then it should work at 800MHz.

Czech version of Lenovo Vibe Shot working on 800Mhz LTE seamlessly
barcomi said:
This is correct, the phone doesn't work on 800MHz. However it should because Qualcom 615 supports 800MHz. the reason it doesn't work is because the modem is probably locked within the ROM. I am hoping once this phone is release european version then it should work at 800MHz.
Click to expand...
Click to collapse
Hi, i already have had the European version of Lenovo Vibe Shot (chinese name Lenovo Z90-7) in my hands. I purchased it recently to compare the Czech and the Chinese model concurrently. All worked perfectly well with the Czech model. The device connected to 800MHz LTE band (band 20) INSTANTLY after the Android system start. No setting necessary at all. It connected to 800MHz T-mobile band in the Czech Republic. While with the Chinese only 3G or less! Another LTE band (2100MHz perhaps) worked well - Vodafone Czech Republic. So LTE hardware is ok but 800MHz missing...
The test is here: youtube.com/watch?v=Mv5RoN_BYSc
No doubt i was intentionally deceived by the seller namely minideal.net; and many others customers are being deceived the same way!

coptrade said:
Hi, i already have had the European version of Lenovo Vibe Shot (chinese name Lenovo Z90-7) in my hands. I purchased it recently to compare the Czech and the Chinese model concurrently. All worked perfectly well with the Czech model. The device connected to 800MHz LTE band (band 20) INSTANTLY after the Android system start. No setting necessary at all. It connected to 800MHz T-mobile band in the Czech Republic. While with the Chinese only 3G or less! Another LTE band (2100MHz perhaps) worked well - Vodafone Czech Republic. So LTE hardware is ok but 800MHz missing...
The test is here: youtube.com/watch?v=Mv5RoN_BYSc
No doubt i was intentionally deceived by the seller namely minideal.net; and many others customers are being deceived the same way!
Click to expand...
Click to collapse
This is amazing. I hope soon someone will release the european ROM, so I can update my chinese phone with european ROM. Do you think the Chinese phone will work on 800MHz with the European ROM?

barcomi said:
This is amazing. I hope soon someone will release the european ROM, so I can update my chinese phone with european ROM. Do you think the Chinese phone will work on 800MHz with the European ROM?
Click to expand...
Click to collapse
Well, i consulted this with some mobile phone services earlier and they did not recommend updating the ROM like that. Your device can end up dead after it. The ROM must be perfectly tuned to the particular HW specification of your device to avoid the fatal consequences. It is quite risky... i was thinking the same way. I am disputing the seller via PayPal asking for partial refund to be able to re-sell the phone to someone who can do without 800MHz.
Also you cannot freely update the android system without loosing the multi-language and Google Play... So shopping mobile phones in China? NOT A GOOD EXPERIENCE FOR ME!
---------- Post added at 04:01 PM ---------- Previous post was at 03:44 PM ----------
coptrade said:
Hi, i already have had the European version of Lenovo Vibe Shot (chinese name Lenovo Z90-7) in my hands. I purchased it recently to compare the Czech and the Chinese model concurrently. All worked perfectly well with the Czech model. The device connected to 800MHz LTE band (band 20) INSTANTLY after the Android system start. No setting necessary at all. It connected to 800MHz T-mobile band in the Czech Republic. While with the Chinese only 3G or less! Another LTE band (2100MHz perhaps) worked well - Vodafone Czech Republic. So LTE hardware is ok but 800MHz missing...
The test is here: youtube.com/watch?v=Mv5RoN_BYSc
No doubt i was intentionally deceived by the seller namely minideal.net; and many others customers are being deceived the same way!
Click to expand...
Click to collapse
Ok, i understand your point. I was thinking the same way. Some mobile phone services would refuse to update the ROM like that though, because it can kill the mobile completely. And who will take the responsibility? The Chinese dishonest dealers should! Let us tell them, we don't like their deception and lies! They are playing the "we don't know" game, but they surely know enough about the differences between Chinese and non-Chinese LTE bands.
But yes, there should be a way to change the ROM the same way the distributors of the real European version of this phone do it. Only where shall we get that ROM and ROM update done? Because, as i have already experienced, the local (Czech) Lenovo representation has no interest in helping owners of Lenovo products purchased in China. How predicable...
---------- Post added at 04:06 PM ---------- Previous post was at 04:01 PM ----------
desi112 said:
The seller says I can send the item back for a full refund but unsure if he will give me a refund as I've changed the ROM to 5.1 The worst thing would be sending the device back to China
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Did you pay via PayPal? You can dispute or claim... Because i say it is just intentional form of deception what they do...
---------- Post added at 04:10 PM ---------- Previous post was at 04:06 PM ----------
barcomi said:
desi112 said:
This seems to be a worldwide problem outside China. It is nothing to do with APN settings, etc.
A company is selling this phone on Amazon USA and they have specifically mentioned 4G does not work in the USA.
I am based in the UK and 4G doesn't work. I have flashed the phone and have now android 5.1 installed on it, but until official EU version of this phone is released we will be stuck with 3G
Click to expand...
Click to collapse
You are right some (many) Chinese dealers are cheating... and we pay for it.
Click to expand...
Click to collapse

coptrade said:
Well, i consulted this with some mobile phone services earlier and they did not recommend updating the ROM like that. Your device can end up dead after it. The ROM must be perfectly tuned to the particular HW specification of your device to avoid the fatal consequences. It is quite risky... i was thinking the same way. I am disputing the seller via PayPal asking for partial refund to be able to re-sell the phone to someone who can do without 800MHz.
Also you cannot freely update the android system without loosing the multi-language and Google Play... So shopping mobile phones in China? NOT A GOOD EXPERIENCE FOR ME!
I changed my ROM, but it is just simplified ROM (done by chinese guys) without the bloatware ...
I got it from this link
http://forum.xda-developers.com/android/general/lenovo-z90-7-vibe-shot-international-t3148018
Click to expand...
Click to collapse