Hi,
I have Galaxy S4 (I9505) and after official update, I have faced error of unknown baseband and lost IMEI (null/null). Problem was, that IMEI and baseband were working only, when I fully discharged phone, put it on charger and turned it on. But when I called once, I have lost IMEI and basbend suddenly, same for the second start after 0% battery. I have made EFS backup via terminal emulator and "dd" operation - (http://forum.xda-developers.com/showthread.php?t=2433966) and to successfuly recover EFS, I had to delete it first. But when I delete EFS and reboot, EFS folder is not empty but is populated from somewhere. I am not able to get into "permanent safe mode" so I am unable to restore EFS.
Anyone faced the same problem? Do you know, from where is EFS folder auto-populated? I have also tried old stock ROM, problem is I cannot downgrade to original ROM before update, it was 4.2.2 and I can't downgrade bootloader. Newest 4.3 ROM also doesn't solve the problem.
Thank for any ideas
Hmyzak
Anyone?
Related
hi. I have a i9500 I try to change imei but I back up efs folder with root explorer. after tring with z3x box to do that, imei chaged to null.
I tried to restore efs backup with z3x box and I pushed restore button but phone after restart could not boot up after samsung logo.
I flashed it with 4.2.2, 4.3 and 4.4.2 android but the problem doesn't change. I wrote cwm recovery to use that for mount internal memory for restoring efs folder but it doesn't work. I can't access to internal memory. please help.
thanks . sorry for my bad english
midnight_prisoner said:
hi. I have a i9500 I try to change imei but I back up efs folder with root explorer. after tring with z3x box to do that, imei chaged to null.
I tried to restore efs backup with z3x box and I pushed restore button but phone after restart could not boot up after samsung logo.
I flashed it with 4.2.2, 4.3 and 4.4.2 android but the problem doesn't change. I wrote cwm recovery to use that for mount internal memory for restoring efs folder but it doesn't work. I can't access to internal memory. please help.
thanks . sorry for my bad english
Click to expand...
Click to collapse
why you messed up with efs folder?
My problem started when i tried to install a custom ROM. I was on Omega ROM v23 and all was fine but i tried to install other ROM and after the install was complete the phone turned off. I pressed power button but nothing. So i pulled the battery and the phone started. But my surprise is i have no signal and no IMEI??? I restored my nandroid backup from Omega ROM and my IMEI is back and signal but every time i turn on WiFi the phone reboots in Factory Mode and wifi turns off. After that i downloaded ES File Explorer to verify my EFS folder and is empty. So i said no problem i have my EFS backup. I did it manually and with 1 app from Google Play in .img and on tar.gz but the app doesn't restore my EFS backup. It says i have to use other app for that? However after downloading the app and restoring EFS it says i have to reboot but when the phone is back EFS folder is empty so no working. If i try to copy files it says there isn't available space. Please help. Any suggestion is appreciated.
PS: My model is N900w8 from Telcel with NH1 Bootloader and Baseband
Restore EFS through the restore option in recovery, or try rebuilding nv data via the service menu
Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
My guess is your were on lollipop and flashed kitkat.
Flash a lollipop modem and your imei is back.
New Life said:
Guys i need a help here i flashed official rom for s4 i9500 , and i did efs backup ,,
after finishing flashing i cant get any signal and null/null IMEI .. now how to restore efs folder ??
anyone can help
Click to expand...
Click to collapse
If you did a backup then you should be able to restore that backup using the same method. Eg: If you used an app, that app should be able to restore the efs folder.
The problem with the EFS folder on the latest versions of Android is that it doesn't contain the IMEI, last time I checked. The IMEI is now stored in hidden partitions, which is why when it comes to backing up this important stuff I recommend Wanam's EFS Backup tool from the Play Store. Not only does it back up the EFS folder, but also backs up those hidden partitions as well as the modem..
In this instance however, Lennyz1988 I believe has the right answer.
Guys i need help as I have lost my EFS folder. Summary of how it happened is as below:
Initially I had Note 4 Verizon version running Lollipop 5.0.1
I used a method to turn it into Developer Edition (DE) and I was successful in doing that.
Once got through that I installed customer Recovery (TWRP) and made a backup for it (including EFS folder and everything else)
After that I got SUPERSU installed and root access to my mobile.
Everything until this point was smooth and no issues until I installed XPOSED FRAMEWORK and my mobile got stuck on the boot screen.
After alot of hit and tries I used TWRP for Factory reset and WiPE DATA.
Since then I was totally lost in a boot loop.
I used ODIN with official ROM (downloaded through SAMMOBILE) for my variant and restored the boot but again my mobile went back to stock version.
Now the problem is that my phone gives me a message "FACTORY MODE IS ON ........................................."
Now my WiFi turns OFF automatically and everytime I bootup my mobile I have to enter passcodes for WiFi every single time.
I have again got it into Developer Mode and got the root access as well but when I check the EFS folder using TWRP, ROOT EXPLORER or any other software which has access to root files I can see that EFS folder is empty.
I even tried restoring the backup through TWRP (first time complete and 2nd time only EFS folder). It shows success but still EFS folder is empty.
Now I need support if anyone can either help me with the EFS file or help me restore the EFS file that I have available through TWRP backup.
In desperate need of help because I have tried every method I can find on this forum or after google results but none is working...
Any support to help it work will be very helpful and save me from losing my only source of mobile communication.
ThankS!!!
Try this:
https://play.google.com/store/apps/details?id=ma.wanam.efs
It saved me before =)
ledzpg said:
Try this:
https://play.google.com/store/apps/details?id=ma.wanam.efs
It saved me before =)
Click to expand...
Click to collapse
Dear this is a software to backup already existing EFS folder whereas my efs folder is totally empty...
Need someone to help me either with Verizon note 4 efs folder or help me on how to recover already backed up efs folder through TWRP..
Hello, I have the same problem with my sm-n910t. have you found the solution.. it would be a big help. thanks in advance.
Find the efs file compatible for your phone from google and install it into your phone using Odin
Hi! I have a hlte/SM-N9005 with LineageOS.
Today I tried to turn on encryption, but then I was stuck in a boot loop. I did a full wipe in TWRP and restored everything from the backup I made before (including the modem partition).
My phone boots again (without encryption), but isn't able to detect any SIM card suddenly. Not sure if something went wrong with the restored modem backup?
I tried downloading a Swiss firmware from this link, extracted it, and flashed modem.bin and NON-HLOS.bin via Heimdall - this didn't help either, though. I'm kind of out of ideas now... Any idea what's going wrong?
IMEI correct ??
Phone Status > Status > IMEI information says "IMEI: unknown" :-/ I'm guessing this is supposed to be there, even without a SIM?
Restore your backed up EFS folder .
Restoring the EFS folder from the TWRP backup is what got me into this mess in the first place. There's probably supposed to be a /efs/.nv_data.bin in the backup, but there isn't for whatever reason. I don't have older backups anymore either.