[Q] Unknown Baseband/Null IMEI (D415) Cllosed Thread - LG Optimus L90

I have experienced a BIG problem with my D415. I was flashing a CM12 ROM when I noticed that once it turned on, I had no signal. WI-FI does work though. I then thought it was a system defect. I decided to flash another ROM and the same thing happened. So then I decided to format /system and THEN install a different ROM. It did not work. When I flash a fully stock ROM through LG flash tool, I noticed that there was also no signal. I went into the software information section of about phone and I noticed that my Baseband version is unknown. I go into the status tab and I see under everything is unknown.
My SIM Card is inserted properly. I think it is a defect with the EFS partition.
EDIT: I found old backup files of the modem partition and flashed them! Thread Closed

Related

[Q] Baseband version unknown, no IMEI, doesn't recognize SIM

So basically I have a phone (not mine) that says Baseband version: unknown, no IMEI when dialing *#06# and doesn't recognize SIM card at all.
Apparently the phone is running stock KK9 2.3.6. AFAIK it has not been rooted or had custom ROM's installed.
The owner said it recently started dropping from network, and usually didn't reconnect at all. This would indicate a broken baseband chip, since now it doesn't even recognize the card?
Any suggestions what to try?
jusutus said:
So basically I have a phone (not mine) that says Baseband version: unknown, no IMEI when dialing *#06# and doesn't recognize SIM card at all.
Apparently the phone is running stock KK9 2.3.6. AFAIK it has not been rooted or had custom ROM's installed.
The owner said it recently started dropping from network, and usually didn't reconnect at all. This would indicate a broken baseband chip, since now it doesn't even recognize the card?
Any suggestions what to try?
Click to expand...
Click to collapse
Try Flashing Stock ROM, Follow link for instructions.
http://forum.xda-developers.com/showthread.php?t=1424997
Thanks for the quick reply. Unfortunately flashing did not help.
EFS corrupted? Any backup done?
No backup done.
you might wanna try this see if it helps... http://forum.xda-developers.com/showthread.php?t=1264021
Apparently there is a backup of the original EFS file - is it possible to just restore it?
do u meant the original files under /efs/? If that's what you meant, try to follow the steps in the previous SGS2 link. Else if it's an external EFS backup image, then there should be no problem restoring it ie. with EFSProBackup. good luck...
Now it's getting even stranger;
the phone works fine when the battery is removed for about half an hour and SIM card installed after that. I left the phone on my desk without the battery for the night, and now it works just fine. But I know that when I reboot it, it loses the baseband once again.
You mentioned you've flashed a stock rom before, which method did you use, pc odin or cwm/mobile odin? did u do a full wipe?
After restoring ur EFS, do a nand backup if you need to then wipe data/dalvik/cache from recovery mode and reflash via pc odin with a stock rom in ur region...
It look like to me you are having hardware problem. Send it back for replace or repairing..
Sent from my GT-N7000 using XDA App

[Q] {SOLVED} IMEI blank after flashing SlimICS through CWM

- SOLVED! Flashed a different ICS Rom along with Semaphore kernel and everything works again!
Hey all!
I have a BIG problem... Yesterday I flashed SlimICS 2.9 on my friend's Galaxy S device through CWM. Installation went fine and system booted up OK. I quickly noticed that there was no mobile network available and I went to check the IMEI as I was suspecting the worst. The IMEI showed up as blank on the phone...
I checked the /efs folder and all the files were present (nv_data.bin and such). I also noticed that there was a /efs backup on the internal sdcard. I tried overwriting the files from the backup to the /efs folder on the root to no avail. Upon deleting the /efs folder or any files in the folder, they are automatically placed back. Why does that happen?
I cannot use the phone's usb port since it's broken.. so all has to be done from within the phone. (External sdcard still functions, ofcourse).
Spent a lot of hours searching and reading - I'm desperate!
Robin2 said:
Hey all!
I have a BIG problem... Yesterday I flashed SlimICS 2.9 on my friend's Galaxy S device through CWM. Installation went fine and system booted up OK. I quickly noticed that there was no mobile network available and I went to check the IMEI as I was suspecting the worst. The IMEI showed up as blank on the phone...
I checked the /efs folder and all the files were present (nv_data.bin and such). I also noticed that there was a /efs backup on the internal sdcard. I tried overwriting the files from the backup to the /efs folder on the root to no avail. Upon deleting the /efs folder or any files in the folder, they are automatically placed back. Why does that happen?
I cannot use the phone's usb port since it's broken.. so all has to be done from within the phone. (External sdcard still functions, ofcourse).
Spent a lot of hours searching and reading - I'm desperate! Therefore I'll happily reward the person who can help me out with $15! I know it's not much, but I cannot spare much money at this moment..
Click to expand...
Click to collapse
There is an app "Mobile Odin" .. us this to flash stock firmware on your friend's phone.. I haven't used this app myself but it should work.. you can download the stock firmware from sammobile.com .. once you flash the stock firmware your IMEI number should be restored... then you can try flashing rom once again
PS: Please don't offer money like this.. donating to the developers of Roms and apps is enough.. they are the ones doing the main stuff..
Didn't know that Mobile Odin existed! Seems like a great program.. I installed it and upon opening it tells me that ''A compatible device was detected, but with unexpected partition layout. Mobile ODIN cannot operate. This is a common error on CM and MIUI ROMs on some devices.''
What ROM would I flash through CWM to get this app to work for me? Is Mobile ODIN incompatible with ICS?
UPDATE:
I flashed a different ICS Rom, Codename 1.5.6, and now the IMEI shows up when dialing *#06#! I was also able to unlock the SIM!
EDIT:
I was able to call! However Data connection does not work! Even with the right APN settings... Would this be caused by the firmware?
dont worry,i had the same bug.you have to flash another kernel,Glitch,or Semaphore for example...then you will get data connection
Lawrrer said:
dont worry,i had the same bug.you have to flash another kernel,Glitch,or Semaphore for example...then you will get data connection
Click to expand...
Click to collapse
Yes this is what worked for me. Figured this out like 5 mins before you posted.
Thanks for the reply, though!
Sorry, wrong place

Weird problem with modems: "Unknown" baseband, IMEI, etc.

Hi!
Resume:
My note has some weird problem with the modems. I'm getting "Unknown" baseband, modem verison, phone number, IMEI etc. with all the modems I tried except one, which shows the correct IMEI and modem version but still not working(I can even see the mobile networks with that one, but I it doesn't connect and gives me "Refresing SIM data" messages).
Click to expand...
Click to collapse
I always have been using custom roms(only TW) and updating my note to the latest version and I never had a problem.
One day, some months after the last rom update, started to lose the phone network conection and I was getting pop-ups with "Refreshing SIM data"(was very annoying because that was turning on the phone screen every few minutes). Sometimes I had phone network and sometimes I hadn't. The disconnections became more frequently. The phone also started to eat up the free space for apps, so I had to remove several apps to install or update even a small one.
So I decided to change to a different ROM to see if that fixes both problems, but I got the actual problem.
I was in AllianceRom v3 JB when that happened.
I flashed this AryaMod 5.5 JB following their instructions and I got this weird problem. In the "About phone" says that the Baseband version, IMEI, IMEI SV, Network and My phone number are "Unknown". I can't even search for mobile networks because it says "Insert SIM card" when I try to open the Mobile networks menu. Tehre are no signal bars, only a "denied" icon on the status bar.
I tested all JB modems and some from ICS from the "all modems" thread, but I was getting the same "Unknown" things in each one, except the XXLSO, where the Baseband version, IMEI and IMEI SV were okey. I could also find mobile networks with this modem, and the "Refreshing SIM data" thing returned, but it was not possible to connect to a network. With this one, there aresignal bars, but they are empty.
I flashed the AllianceRom and even the old ICS rom I had before, but the problem persisted, even with the modems they came with.
Now I'm on the latest Samsung rom(LT4), unmodified and flashed with odin and the problem persist.
I found this old thread. His initial problem is very similar to mine, but they don't know what caused it nor how to fix it.
I have also found something about corruped IMEIs that you can fix doing something with the ADB and restoring EFS folder, but I think that is not my case because I can see my original IMEI with the XXLSO modem (and I my EFS folder looks OK, anyway I have no backup of that).
I don't expect to get a step-by-step tutorial about how to fix this, but I hope somebody can put me in the right direction. I will post the solution if I find one!
What are the first 4 digits of your imei
Sent from my Nexus 5 using Tapatalk
Thanks for reading, the four first digits are 3595.
Maybe this is a stupid question, but have you tried re-seating your Sim card, or even a different Sim?
Sent from my Nexus 5 using Tapatalk
I tried both. Also I have been using the SIM with another phone for weeks and works fine. Tried to take out the battery and wait few minutes and other "stupid" things like re-flash a ROM, re-wipe all, etc..
Maybe it's the programed obsolescence, you can use the Note as PDA but if you want a phone, go and buy another...
@ThaiDai or @nokiamodeln91 I believe knows of a way to fix this if its an EFS issue...but you don't have a developer imei
Did you have an old efs backup from when u first rooted your phone?
Sent from my Nexus 5 using Tapatalk
AndroidSlave said:
@ThaiDai or @nokiamodeln91 I believe knows of a way to fix this if its an EFS issue...but you don't have a developer imei
Did you have an old efs backup from when u first rooted your phone?
Sent from my Nexus 5 using Tapatalk
Click to expand...
Click to collapse
If it was a corrupted IMEI issue then it should not come back when the xxlso modem is flashed.. And also not sure why it goes to unknown when any other modem is used.. Could there be any physical damage to the sim tray? Dropped the phone?
I have no backup of efs... I had one "nandroid" but deleted it after everything was okey...
I could delete the efs folder, so this unknown problem will turn a known one :victory:
I dropped the phone a very few times, maybe in one of those something broke a little and has increased more with the usage? (the disconnections from the network became spontaneus and progressively).
I found this other thread, I could try the same but I can't find the original GB firmware, every link I find is in hotfile.
Check in Samsung-updates.com firmware section. There are 2 GB roms there..
I found a efs backup from may 2012, probably auto-created when first installed ICS.
I flashed the stock GB rom and restored it following this tutorial for my .tar.gz file, but didn't work, so the device may be lost. I only have 3 more backups: boot.img, data.ext4.tar and system.ext4.tar. I guess they are useless to fix this...
Thay you for you support!

[Q] Lost IMEI/Invalid SIM Card Error when running CyanogenMod

Hi guys,
I was adamant I could fix this on my own, but I've been chasing my tail for two days now and still no luck.
I'm trying to get CyanogenMod 12 running on my C6903 Xperia Z1. As far as I can tell, I did everything right:
- Rolled back to 14.1
- Rooted with vROOT
- Backed up TA partition
- Unlocked bootloader using official Sony method
- Installed PhilZ Dual Recovery
- Installed CM12 and GAPPS
Everything SEEMS to be working fine, except I get no mobile signal, the phone reports "Invalid Card - Emergency Calls Only", and my IMEI appears to be 0.
Note that this is NOT the issue I've seen a lot of other users having, where both the IMEI and Baseband version are unknown. My baseband is fine; it is just the IMEI that seems to be the problem.
I've tried a lot of fixes that seem to have worked for people with the baseband issue, but none have helped.
At first I assumed it must just be an unresolved issue since I was using a daily build of CM (23/01/15). But I've tried the most recent CM11 Snapshot (2014-11-12) and it has the exact same issue.
When I go back to using stock ROMs, the IMEI number returns and the mobile network works fine, so I can safely assume I haven't corrupted the partition.
I read somewhere that, on Samsung phones, the IMEI data is stored on the /efs partition, and that some baseband versions are incompatible with with the format of newer /efs partitions. Is the same possibly true of the TA partition, where the Z1 stores its IMEI info?
Along that line of thought, I tried flashing the baseband only from a 14.1 FTF that had been confirmed working, but to no avail.
I have a backup of the TA partition, but since restoring that means locking the bootloader and thus preventing me from running any custom ROMs, that's obviously not going to help. Is there any way to restore only the IMEI info from a TA backup? Alternatively, am I going down completely the wrong path in trying to fix this? Any help would be appreciated.

GT-9305t NOT REGISTERED ON NETWORK/CORRECT IMEI

HELLO EVERYONE.
i have a samsung i9305T i flashed it wth L.P rom then suddenly
my imei went 0049. i tried anything bUt no luck. so i decided to flash a stock one
4.1.2 my imei was back. But when i try to insert my network sim it says.
NOT REGISTERED ON NETWORK . tho ived used this phone before here in the philippines
so im sure it is unlocked.
any help guys.? thank you in advance does my baseband caused the issue?
please help ...
Hi,
I'm not an expert at all but i have a theory :
I think you get a corrupted EFS. You flashed L.P rom so the format of your EFS changed to V2. So when you tried to return to 4.1.2, the phone can't read your efs anymore.
I think the solution is to flash a newer baseband, for example the L.P baseband or a KK baseband.
Read more about efs format => http://forum.xda-developers.com/galaxy-s3/general/ref-imei-efs-stuff-i9300-including-t2393289
Hope it helps.

Categories

Resources