[Q] {PRO} Roaming, no 3G/H data after flashing any ROM - Xperia Arc Q&A, Help & Troubleshooting

I have a MK16a and have happily unlocked the bootloader and flashed a new kernel over the stock ROM; I have the latest baseband installed.
Any time I try to flash another ROM, I can't get mobile data to work. I show as Roaming, and can connect to GSM but nothing else. APN settings are good. Flashing a different kernel doesn't seem to help either. I tried re-flashing the stock ROM and then a kernel and then the ROM I wanted, didn't work. I tried doing a Factory Reset over the stock ROM that works and flashing another ROM, didn't work. If I restore the backup I made before doing any of this, everything works again - I just can't get any other ROMs to work!
I've searched XDA and other sites pretty extensively and I'm not coming up with anything. Anyone got any ideas?

If you can, ask operator to change your SIM. Should be a few minutes process at the store. I had same issue a year ago as well, although I left the country already, so it was not a problem.
Just a note, that all questions should be posted in Q&A section.

Someguyfromhell said:
If you can, ask operator to change your SIM. Should be a few minutes process at the store. I had same issue a year ago as well, although I left the country already, so it was not a problem.
Interesting idea. I know the SIM works ok with the carrier-provided ROM on the phone, but it is a fairly old SIM card. Night be worth trying, tahnks for the suggestion!
Someguyfromhell said:
Just a note, that all questions should be posted in Q&A section.
Click to expand...
Click to collapse
*facepalm* Yes, of course they should.
Click to expand...
Click to collapse

Any luck yet?
If still same situation, make sure you are using baseband from MK16a firmware, not MK16i.

If your carrier is so-called virtual network operator, you may need to enable national data roaming in the settings. It's available in the mobile network settings at least in CyanogenMod ROMs.
--Ere

Someguyfromhell said:
If you can, ask operator to change your SIM.
Click to expand...
Click to collapse
Finally got around to doing this! Updating the SIM (which we figured out was probably between 5 to 8 years old) has resolved the issue.

Related

[Q] Can't Connect to Mobile Network after Custom ROM Flash

Hi all, so I'm in quite the predicament. I can't seem to reestablish a mobile connection via Verizon at all since I've overwritten the stock ROM with Cyanogen. I have Inc2, now loaded with CM7, awaiting some help.
First I unlocked the bootloader and flashed CWM Recovery.
Next I flashed Build 4 CM10 http://forum.xda-developers.com/showthread.php?t=1934288 <--check it out here.
I couldn't establish any network connection whatsoever. So i wiped and flashed CM9 with the hopes it would be more stable. http://forum.xda-developers.com/showthread.php?t=1932573 <--again check that one out.
Again, no network connection. Lastly, I reverted to CM7 (because it was the last stable release directly from Cyanogen). http://wiki.cyanogenmod.org/index.php?title=Vivow_Info <--looky here.
I've searched far and wide, trying everything possible. From simply switching on/off airplane mode to manually typing in the Verizon APN. I just can't establish network connection now...and the kicker - I forgot to backup the stock ROM so I'm currently stuck. Please help
This thread may be of some help. Didn't do me much justice however. http://forum.xda-developers.com/showthread.php?t=1691017
Bumping. Somebody please help...Also if anyone has a stock ROM they could share, that'd do fine as well. I'm curious if stock ROM would re-enable the radio (if that's the actual problem).
Sane116 said:
Bumping. Somebody please help...Also if anyone has a stock ROM they could share, that'd do fine as well. I'm curious if stock ROM would re-enable the radio (if that's the actual problem).
Click to expand...
Click to collapse
You don't need to bump a thread after 30 minutes -.-
nitsua98 said:
You don't need to bump a thread after 30 minutes -.-
Click to expand...
Click to collapse
Goes to show how desperate I'm becoming.
Have you tried changing your mobile network? Settings > more> network mode
Been there. You can try different radios from here, but BE CAREFUL. Take the following precautions:
Because you're on Verizon, only download 'x.x.01.xxxx' radios.
After putting the ZIP file on the SD card, verify the MD5 hash to ensure the file didn't get corrupted during download or during transfer to the SD card.
Plug the phone into your charger before installing. You don't want it shutting off during install.
Don't flash the same radio that your phone already has installed.
If all else fails, try the stock 2.3.3 RUU from HTC. If you can find a working download link to that, please share.
Airo18 said:
Have you tried changing your mobile network? Settings > more> network mode
Click to expand...
Click to collapse
I've tried everything in the books. Manually setting my APN according to the Verizon settings. Also did trial and error booting and rebooting each network type to no avail.
A few things I noticed in the CM9 ROM (maybe bugs?):
The preferred network mode typically defaults to GSM/WCDMA upon reboot
The APN I create often disappear upon reboot.
Mobile Networks>Network Operators will either search endlessly or sometimes find both AT&T and T-Mobile as options, both of which won't actually connect as I have a Verizon SIM.
And in response to Slinkwyde:
To verify the MD5 hash, what needs to be done more specifically? (I'm learning as I go ) Did flashing a radio do the fix for you? I'll try this suggestion and post results.
Sane116 said:
I've tried everything in the books. Manually setting my APN according to the Verizon settings. Also did trial and error booting and rebooting each network type to no avail.
A few things I noticed in the CM9 ROM (maybe bugs?):
The preferred network mode typically defaults to GSM/WCDMA upon reboot
The APN I create often disappear upon reboot.
Mobile Networks>Network Operators will either search endlessly or sometimes find both AT&T and T-Mobile as options, both of which won't actually connect as I have a Verizon SIM.
And in response to Slinkwyde:
To verify the MD5 hash, what needs to be done more specifically? (I'm learning as I go ) Did flashing a radio do the fix for you? I'll try this suggestion and post results.
Click to expand...
Click to collapse
Verizon sim? What country are you in, are you using gsm?
Sent from my Incredible 2 using xda app-developers app
jeremytn86 said:
Verizon sim? What country are you in, are you using gsm?
Sent from my Incredible 2 using xda app-developers app
Click to expand...
Click to collapse
Yes, verizon sim card. I'm in the USA. And I believe I am supposed to be using GSM but I don't fully comprehend the differences between each type. However I have tried setting each type in system settings>mobile networks with no data showing at any point.
Sane116 said:
And in response to Slinkwyde:
To verify the MD5 hash, what needs to be done more specifically? (I'm learning as I go ) Did flashing a radio do the fix for you? I'll try this suggestion and post results.
Click to expand...
Click to collapse
Yes, flashing a radio worked for me. The simplest way would be to use an MD5 checker app. Use the app to make sure the file on your SD card matches the MD5 value given in the radio thread I linked to.
One more precaution: Don't ever flash the same radio version that your phone is already using. That caused problems with the original Incredible and might also cause problems with the Incredible 2. To see what radio version you have, go to Settings and look around in About phone, Phone info, or something to that effect. "Baseband" is another word for radio.
Sane116 said:
Yes, verizon sim card. I'm in the USA. And I believe I am supposed to be using GSM but I don't fully comprehend the differences between each type. However I have tried setting each type in system settings>mobile networks with no data showing at any point.
Click to expand...
Click to collapse
Short version: For Verizon, you want CDMA with EvDO.
Longer overview: CDMA vs GSM, and what it means for the Incredible 2
Verizon Wireless and Sprint use CDMA. AT&T and T-Mobile use GSM. CDMA is popular in the United States, but around the world GSM is far more common. All GSM phones use SIM cards, but most CDMA phones don't. The two kinds of CDMA phones that do have SIM cards are world phones (phones with both CDMA and GSM) and LTE phones (faster data speeds).
The Incredible 2 is a world phone (without LTE) and comes with a Vodafone SIM for overseas travel. This Vodafone SIM also has Verizon Wireless branding on it. The Verizon Wireless company is jointly owned by Verizon and Vodafone, a European carrier based in the UK. Verizon world phones have to be unlocked to use AT&T or T-Mobile, because Verizon doesn't want their customers switching to a competitor.
SIM cards make it easy for GSM users (not you) to use their carrier account in another phone. They can just swap the SIM. For CDMA carriers (such as Verizon), swapping service to a different phone requires contacting the carrier.
Sane116 said:
Yes, verizon sim card. I'm in the USA. And I believe I am supposed to be using GSM but I don't fully comprehend the differences between each type. However I have tried setting each type in system settings>mobile networks with no data showing at any point.
Click to expand...
Click to collapse
You don't need the sim card at all then, you're CDMA. If you're not on it already i would recommend flashing the latest ics firmware, it can be found in the ICS leak ROM thread posted by nitsuj17 , it includes the newest radio
Sent from my Incredible 2 using xda app-developers app
Jeremy is referring to this thread: http://forum.xda-developers.com/showthread.php?t=1846304
Note that he's specifically suggesting that you install the ICS firmware. You don't have to install the ROM.
jeremytn86 said:
You don't need the sim card at all then, you're CDMA. If you're not on it already i would recommend flashing the latest ics firmware, it can be found in the ICS leak ROM thread posted by nitsuj17 , it includes the newest radio
Sent from my Incredible 2 using xda app-developers app
Click to expand...
Click to collapse
Slinkwyde said:
Jeremy is referring to this thread: http://forum.xda-developers.com/showthread.php?t=1846304
Note that he's specifically suggesting that you install the ICS firmware. You don't have to install the ROM.
Click to expand...
Click to collapse
Okay so what you both are suggesting are to just install the firmware, assuming I am already running the CM9 ROM? Because the firmware includes the radio. And this is done by renaming the firmware to PG32IMG and flashing it through hboot? Would this be an easier course of action than installing a radio alone? My phone is S-ON and if I'm correct, S-OFF needs to be active to install a radio.
Yes, you can install the firmware to get the radio, and the file name needs to be PG32IMG.zip for hboot. S-OFF is generally required for this sort of thing, yes.
Slinkwyde said:
Yes, you can install the firmware to get the radio, and the file name needs to be PG32IMG.zip for hboot. S-OFF is generally required for this sort of thing, yes.
Click to expand...
Click to collapse
Thanks so much guys, you've been more than helpful. Now to get some work done...I'll post results either tonight or tomorrow once I've finished. Wish me luck!
Put the battery cover back on. It'll instantly drop sig. when not installed.
TA4S
I'm currently trying to downgrade Inc2 so I can S-Off in order to flash either new firmware or radio. I am following this http://forum.xda-developers.com/showthread.php?t=1726134 and cant seem to download the necessary RUU 2.3.3 for Inc2. It seems as if the downloads link is dead. Can anybody link to such a file? I cant seem to find one anywhere.
EDIT: Found a stock (or as close to stock I could find) ROM for INC2 >> http://d-h.st/I2g
Also, I may have a potential reason as to why I'm having this ***** of a problem. I originally unlocked bootloader using the HTCdev tool. At the time it was my understanding that the process did not matter as long as the results were the same. However it seems now that using their tool makes it so you can't flash radios and need to extract and separately flash ROM kernels. So does this mean flashing any of the CM ROM's I tried never included the radio portion?
Just stabbing at ideas. Feel free to verify/call me out.
Sane116 said:
Also, I may have a potential reason as to why I'm having this ***** of a problem. I originally unlocked bootloader using the HTCdev tool. At the time it was my understanding that the process did not matter as long as the results were the same. However it seems now that using their tool makes it so you can't flash radios and need to extract and separately flash ROM kernels. So does this mean flashing any of the CM ROM's I tried never included the radio portion?
Just stabbing at ideas. Feel free to verify/call me out.
Click to expand...
Click to collapse
Roms NEVER include a radio, its always separate. something weird has happened to you, I'm sure flashing new radio would fix it for you but you're dev unlocked which is gay Lol. When you flashed the cyanogen ROMs did you pull kernel and flash like you were supposed to, if not i can't believe you got it to boot but that may be a problem also.
Sent from my Incredible 2 using xda app-developers app
jeremytn86 said:
Roms NEVER include a radio, its always separate. something weird has happened to you, I'm sure flashing new radio would fix it for you but you're dev unlocked which is gay Lol. When you flashed the cyanogen ROMs did you pull kernel and flash like you were supposed to, if not i can't believe you got it to boot but that may be a problem also.
Sent from my Incredible 2 using xda app-developers app
Click to expand...
Click to collapse
If it helps, here is the process that I have used every time I flash anew ROM, working every time (excluding the radio of course.http://www.youtube.com/watch?v=ujFWZbgj6bY
Because I HAD (I actually just reverted back and am currently getting S-OFF to flash a radio) the HTCdev unlock, I manually booted the boot.img after entering recovery and wiping/formatting all the necessary things. Skimming the video might give you a better idea.
However I'm now hoping S-OFF will allow me to reroot, flash CWM, CM9, and of course a radio. Currently in the process of trying to run Revolutionary.

Can't Select Network Operator - HELP

I had my phone working fine on 2.3.6, but I have recently flashed my ROM.
I followed these EXACT instructions (http://www.lorenzobettini.it/2013/08/update-samsung-galaxy-wonder-i8150-to-android-jelly-bean/) and afterwards, I couldn't see Virgin Mobile UK as a Network Operator to connect to. So I can only use WiFi. (However, I saw T-Mobile, Orange, Vodafone and Three. It automatically connected me to T-Mobile, but nothing worked)
I thought it may be a problem with the ROM, so I used the Stable release of this: http://forum.xda-developers.com/showthread.php?t=2120340 ... I have the same problem.
I've now tried a third: http://forum.xda-developers.com/showthread.php?t=2401757 ... still doesn't work.
It can't be the ROMs... Could I need to upgrade my baseband? I don't really know what a baseband is, just what hours of Googling has brought up.
How can I fix this?
WazzleHD said:
I had my phone working fine on 2.3.6, but I have recently flashed my ROM.
I followed these EXACT instructions (http://www.lorenzobettini.it/2013/08/update-samsung-galaxy-wonder-i8150-to-android-jelly-bean/) and afterwards, I couldn't see Virgin Mobile UK as a Network Operator to connect to. So I can only use WiFi. (However, I saw T-Mobile, Orange, Vodafone and Three. It automatically connected me to T-Mobile, but nothing worked)
I thought it may be a problem with the ROM, so I used the Stable release of this: http://forum.xda-developers.com/showthread.php?t=2120340 ... I have the same problem.
I've now tried a third: http://forum.xda-developers.com/showthread.php?t=2401757 ... still doesn't work.
It can't be the ROMs... Could I need to upgrade my baseband? I don't really know what a baseband is, just what hours of Googling has brought up.
How can I fix this?
Click to expand...
Click to collapse
try changing ur baseband/ modem with the one intended for ur country/ region.
dec0der said:
try changing ur baseband/ modem with the one intended for ur country/ region.
Click to expand...
Click to collapse
okay, if this goes wrong, can i restore from my backup on CWM and it'll be fine? also, where ís a tutorial for this?
no need to change operator
Virgin media pay T-mobile/EE to use their network all you got to do i change the apn on your phone manually to get your data and you will be fine
i know this becase i have been doing for the last few months and had no problems
spawnofdonny said:
Virgin media pay T-mobile/EE to use their network all you got to do i change the apn on your phone manually to get your data and you will be fine
i know this becase i have been doing for the last few months and had no problems
Click to expand...
Click to collapse
Okay, will flash a new ROM and will try now.
EDIT: It didn't work for me...
EDIT2: Got it working, used a different APN... Thank you SO much, you're a life saver!

[Q] HELP, Note 2 ATT can not connect to network.

i have Note 2 ATT, i am having network connection problem. i can't connect to my ATT network connection . i get circle with line in middle.
i took my phone to ATT store and they tried changing the Sim card and even updating my phone to the latest update, but it did not work.
i tried downgrading my phone to stock Rom when i downgrade the phone. it seems to work fine for five minutes or so i even made a call after one call it started showing same circle with line in middle. i tried flashing all different Rom, i even tried re flashing MJ4 modem. nothing seems to work.
i research to find a solution but i didn't find any solution to this problem. right now i am on Sky Note Air 4.3.
please help me i appreciate for any help.
EDIT: i flash back to stock Rom 4.3 with rooted MK6 bootloader. just to see if it makes any different on my networking problem. And still have issue with not networking data.
sykox2 said:
i have Note 2 ATT, i am having network connection problem. i can't connect to my ATT network connection . i get circle with line in middle.
i took my phone to ATT store and they tried changing the Sim card and even updating my phone to the latest update, but it did not work.
i tried downgrading my phone to stock Rom when i downgrade the phone. it seems to work fine for five minutes or so i even made a call after one call it started showing same circle with line in middle. i tried flashing all different Rom, i even tried re flashing MJ4 modem. nothing seems to work.
i research to find a solution but i didn't find any solution to this problem. right now i am on Sky Note Air 4.3.
please help me i appreciate for any help.
Click to expand...
Click to collapse
Try flashing 4.3 rom from scratch (wiping dalvik cache, data/factory reset and cache partition) ? May be this will help fixing problem
If you want you can try Stock Rom - http://forum.xda-developers.com/showthread.php?t=2589891
Also make sure you have an APN set. @Bajanman has compiled a list of several AT&T APNs in his thread here: http://forum.xda-developers.com/showthread.php?t=2172110
I had a similar issue and this post helped me.
http://forum.xda-developers.com/showthread.php?t=2068041
Also check your SELinux setting.
Once I set mine to permissive all was well.
parakleet said:
I had a similar issue and this post helped me.
http://forum.xda-developers.com/showthread.php?t=2068041
Also check your SELinux setting.
Once I set mine to permissive all was well.
Click to expand...
Click to collapse
i have no idea what these people are talking about. i am not hacker to do such things like this. but if you know easier way to solve this problem please help. thanks for reply
sykox2 said:
i have no idea what these people are talking about. i am not hacker to do such things like this. but if you know easier way to solve this problem please help. thanks for reply
Click to expand...
Click to collapse
They are not hacking my friend...
Have you verified that your IMEI and EFS folder are normal ?
And have you verified your APN settings for your carrier ??
You mention flashing several roms on the device...
The items I listed will help you determine if any damage has been done....and also help you get service again...
All are knowledge you must have to prevent bad things from happening...
If your carrier did an official update to 4.3 while the device was rooted and running custom firmware....then you absolutely need to start fresh to clean the device up again...
Are you getting Knox errors or force close issues ??
Basically....in order to help you we need a detailed status of the device...
Software version....kernel version ....and baseband.....
The information is in settings/about phone/....and will tell us how best to proceed....g
Sent from my NOTE 2.750...
Courtesy of our amazing developers...
gregsarg said:
They are not hacking my friend...
Have you verified that your IMEI and EFS folder are normal ?
And have you verified your APN settings for your carrier ??
You mention flashing several roms on the device...
The items I listed will help you determine if any damage has been done....and also help you get service again...
All are knowledge you must have to prevent bad things from happening...
If your carrier did an official update to 4.3 while the device was rooted and running custom firmware....then you absolutely need to start fresh to clean the device up again...
Are you getting Knox errors or force close issues ??
Basically....in order to help you we need a detailed status of the device...
Software version....kernel version ....and baseband.....
The information is in settings/about phone/....and will tell us how best to proceed....g
Sent from my NOTE 2.750...
Courtesy of our amazing developers...
Click to expand...
Click to collapse
how do i verify my IMEI and EFS folder
i faced this problem when i was on stock Rom 4.1.2 then i update my to 4.3 and was still facing the problem.
never had problem flashing or rooting my phone. i did not even have problem with Knox.
no force close issue at all.
everything works just fine, even wiffi works fine too.
right now i am on 4.3 stock rooted.
bootloader MK6
baseband version MK6
kernel version: 3.0.31-2048209
[email protected] #1
sykox2 said:
how do i verify my IMEI and EFS folder
i faced this problem when i was on stock Rom 4.1.2 then i update my to 4.3 and was still facing the problem.
never had problem flashing or rooting my phone. i did not even have problem with Knox.
no force close issue at all.
everything works just fine, even wiffi works fine too.
right now i am on 4.3 stock rooted.
bootloader MK6
baseband version MK6
kernel version: 3.0.31-2048209
[email protected] #1
Click to expand...
Click to collapse
I'm confused. The first post you were on Skynote 4.3.
Now you are 4.3 stock rooted ???
dicksteele said:
I'm confused. The first post you were on Skynote 4.3.
Now you are 4.3 stock rooted ???
Click to expand...
Click to collapse
sorry not trying to confuse i flash back to stock rom with MK6 bootloader just to see if it make any changes.
sykox2 said:
sorry not trying to confuse i flash back to stock rom with MK6 bootloader just to see if it make any changes.
Click to expand...
Click to collapse
I'm still confused.....
Reading your first post, ATT flashed your phone to the latest update??? And changed the SIM? And that didn't work?
Why did you leave the store when your phone didn't work?
They told me they can't do nothing about it and the warranty was voided too.
Sent from my SPH-L720 using xda app-developers app
sykox2 said:
They told me they can't do nothing about it and the warranty was voided too.
Sent from my SPH-L720 using xda app-developers app
Click to expand...
Click to collapse
Interesting. I'm asking questions I guess really dont matter.
But why was warranty voided, or was it expired?
Again more confusion.... Just wondering why they changed sim, flashed update, then told you to hit the street with a broke **** phone.
I can understand not replacing it, warranty whatever.
I took an Atrix2 phone into the shop, no working data. I had called tech support, they had OTA refreshed it, didnt work. Set me up with tier 2 tech support, more resets. Nothing.
Went into store, got another sim. Turns out it was simple. I had turned off the data plan awhile back until I was ready to give it to my daughter.
Got online, picked a plan. Data lite off.
Point is they worked with me to find the problem on a phone that was 2-3 years old.
You probably should follow me how to in this section and flash the stock 4.1.1 and go from there.
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app
sykox2 said:
They told me they can't do nothing about it and the warranty was voided too.
Sent from my SPH-L720 using xda app-developers app
Click to expand...
Click to collapse
Well you have nothing to lose at this point then.
I doubt you will find a canned click next solution.
You will probably have to go the "hacking" route.
Good Luck.

[Q] 4G Lost After Flashing Firmware

Hi everybody,
I'm totally new in this flashing world and I was messing around with my new Xperia Z1 Compact trying to get Kit Kat installed because when I bought the phone it came with JB 4.3. I flashed Latest KitKat Nordic 14.3.A.0.757 unbranded, and everything worked like a charm until I discovered that I lost 4G connection (It only connects to 3G). I went to settings to select network, and LTE is checked.
I was reading about this matter and it seems that nordic ROM doesn't support LTE Band 7 (2600Mhz) which is the band in my carrier. I tried flashing Central Europe Rom and Global rom for journalists found here in the forums. None of them seems to support my LTE band. I want to know if there is any way to recover 4G changing any setting or if you know a link to any generic ROM compatible with LTE Band 7 (2600Mhz), or if there is any way to revert to my original Jellybean 4.3 ROM using PC Companion or Sony Update Service. Any help will be very apreciated.
Hello,
I am using the Generic UK .757 on a BAND4 LTE network in Canada.
you have checked off the first thing to do from the checklist..
second is to make sure your APN settings are correct.
All these are simple, but if still no luck, some labour is in order.
Need to do full wipe and clean re-install
IF you are not rooted, just launch Sony PC companion with the phone NOT CONNECTED and do a repair. It should by default take you to KK
At the time of flashing, You probably had the wrong boxes checked and unchecked in the WIPE and Exclude boxes..
I'll try the two options
Thanks guys for the responses.
First I'll try to flask UK ROM to see if finally I get kitkat working on my phone. If this doesn't work I'll take the second option with PC Companion to restore the original ROM. I'll post the results.
It seems this rom doesn't work for me
GuizmoPhil said:
Hello,
I am using the Generic UK .757 on a BAND4 LTE network in Canada.
Click to expand...
Click to collapse
Hi Phil,
I found UK rom in this forum ver. .681 and flashed it, then I downloaded OTA update to .757. So far the problem remains. I discovered that I was wrong about My LTE Band, is 7 not 4. Apparently there's a carrier in UK with band [email protected] same as here (Colombia), so theorically this rom should work, but this is not the case. I'm trying to change more settings without luck. If you know something to help me, it would be very appreciated. Thanks.
Y2j-Hotaru said:
Hi Phil,
I found UK rom in this forum ver. .681 and flashed it, then I downloaded OTA update to .757. So far the problem remains. I discovered that I was wrong about My LTE Band, is 7 not 4. Apparently there's a carrier in UK with band [email protected] same as here (Colombia), so theorically this rom should work, but this is not the case. I'm trying to change more settings without luck. If you know something to help me, it would be very appreciated. Thanks.
Click to expand...
Click to collapse
Try changing it from the ussd *#*#4636#*#*
Sent from my C6902 using XDA Free mobile app
not able to download original rom
jewelkobayashi said:
you have checked off the first thing to do from the checklist..
second is to make sure your APN settings are correct.
All these are simple, but if still no luck, some labour is in order.
Need to do full wipe and clean re-install
IF you are not rooted, just launch Sony PC companion with the phone NOT CONNECTED and do a repair. It should by default take you to KK
At the time of flashing, You probably had the wrong boxes checked and unchecked in the WIPE and Exclude boxes..
Click to expand...
Click to collapse
Hi jewelkobayashi,
I tried the method you wrote, but, despite the phone being disconnected, it downloaded the same ROM that I recently have flashed (GLOBAL .757 commercial and Journalist). Is there any other way to download the original Phone ROM . I know my original ROM is GLOBAL-14.2.A.1.114 and the customization number is 1281-3723. I haven't found any site to download this exact firmware. If you know something, it would be very appreciated. Thanks in advance.
Are you sure about your customization number? Because it gets changed if you flash another firmware. Here's everything you need to know: http://forum.xda-developers.com/showthread.php?p=52011642 to download your firmware. By the way, what's your country, branding and SI-Number (so I can add your customization number to the list)?
Y2j-Hotaru said:
Hi everybody,
I'm totally new in this flashing world and I was messing around with my new Xperia Z1 Compact trying to get Kit Kat installed because when I bought the phone it came with JB 4.3. I flashed Latest KitKat Nordic 14.3.A.0.757 unbranded, and everything worked like a charm until I discovered that I lost 4G connection (It only connects to 3G). I went to settings to select network, and LTE is checked.
I was reading about this matter and it seems that nordic ROM doesn't support LTE Band 7 (2600Mhz) which is the band in my carrier. I tried flashing Central Europe Rom and Global rom for journalists found here in the forums. None of them seems to support my LTE band. I want to know if there is any way to recover 4G changing any setting or if you know a link to any generic ROM compatible with LTE Band 7 (2600Mhz), or if there is any way to revert to my original Jellybean 4.3 ROM using PC Companion or Sony Update Service. Any help will be very apreciated.
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Stop flashing random ROMs and check your settings! Unless you have a different model phone than the rest of us (there are three, D5503, M51w and SO-02F), then ANY Z1C (D5503) ROM will work, but they come with different APN lists as bundling every carrier in the worlds APN settings would be a waste of space. Go to Settings > Mobile Networks > Access Point Names, and edit or create the correct APN in there. Look at a friends phone or on your carriers website for the correct settings. This is your problem, no doubt about it.
Please note that some carriers (mine included) have a special APN for LTE. E.g. standard is internet.tele2.se, LTE is 4g.tele2.se on my carrier.
...I have no idea where you're getting your data from, because literally every LTE network in the Nordics uses band 7.
Finally it worked
Rekoil said:
Stop flashing random ROMs and check your settings! Unless you have a different model phone than the rest of us (there are three, D5503, M51w and SO-02F), then ANY Z1C (D5503) ROM will work, but they come with different APN lists as bundling every carrier in the worlds APN settings would be a waste of space. Go to Settings > Mobile Networks > Access Point Names, and edit or create the correct APN in there. Look at a friends phone or on your carriers website for the correct settings. This is your problem, no doubt about it.
Please note that some carriers (mine included) have a special APN for LTE. E.g. standard is internet.tele2.se, LTE is 4g.tele2.se on my carrier.
...I have no idea where you're getting your data from, because literally every LTE network in the Nordics uses band 7.
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Thanks for your response. I verified APN settings with friend's phones and it was identical. Finally I called my carrier's help desk and after some try/error setups with them, they gave me an alternate APN that worked until I came home where 4G icon dissapeared again. Then, I was surprised with helpdesk response when I called them again. "There is no 4G coverage in your home area". O.O What is intriging to me is that the phone displayed 4G all the time when I just bought it (Even with restarts and wherever i was) and this changed only when I flashed a generic rom. Is just a silly assumption, but, is possible that carriers can make things like force 4G icon in their custom roms to make advertising or something like that? Just asking. Anyway, Thanks a lot for the responses.
crohit911 said:
Try changing it from the ussd *#*#4636#*#*
Sent from my C6902 using XDA Free mobile app
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Emmm do you have a manual to how to use the ussd??
I went into it to check it out, I touched I don't know what...
And now I can no longer connect to my network provider...
(reboot doens't helps, changing to wdmca or gsm or other options doesn't changes, VPN seems ok, I have no signal... )
Help!!!
Ok, this is what I did to screw it all
Go to the ussd *#*#4643#*#*
Go to phone info
Go to setings and Select radio band
It gives me the option of GSM/UMTS band = USA Band
-> I no longer have WCDMA or GSM connection :S
(LTE still works...)
Now, how do I go back to my previous options? or does it has nothing to do with it, and the problem is something else?
EDIT> problem solved, I had to reflash my ftf by just updating the FOTA (not sure I needed this...) and the BASEBAND... Now I am back up and running again.. >D
emilic said:
Ok, this is what I did to screw it all
Go to the ussd *#*#4643#*#*
Go to phone info
Go to setings and Select radio band
It gives me the option of GSM/UMTS band = USA Band
-> I no longer have WCDMA or GSM connection :S
(LTE still works...)
Now, how do I go back to my previous options? or does it has nothing to do with it, and the problem is something else?
EDIT> problem solved, I had to reflash my ftf by just updating the FOTA (not sure I needed this...) and the BASEBAND... Now I am back up and running again.. >D
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Good to know that your problem is solved, even better you solved it yourself. Sorry for not being able to help, I don't know about that ussd code I shall try.
Sent from my C6902 using XDA Free mobile app
crohit911 said:
Good to know that your problem is solved, even better you solved it yourself. Sorry for not being able to help, I don't know about that ussd code I shall try.
Sent from my C6902 using XDA Free mobile app
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Click to collapse
Actually, there's an app in Google Play that is a shortcut to this ussd code : 4G LTE SWITCH

[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!!!!
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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?
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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......
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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?
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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....
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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?
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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?
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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?
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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?
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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 :
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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.
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No unfortunately I couldn't find anything, I now flash some 4.4.2 rom from e988 just in case.....

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