lost IMEI after flashing CM11 M5

ksio89 said:

After I flashed CM11 SNAPSHOT M5 on my Brazilian Optimus G E977 model (firmware version E97710d), I faced several crashes with "Subsystem crash" BSOD, with Demigod Handler issue or something like that . Several reboots later, the crashes stopped, however the mobile network was not working. Checked IMEI on status menu it was reported as null. I have a backup of EFS partition performed by FreeGee.

I tried all the tools available that I've found

1-flash a zip package containing the the 3 backed up .img files in CWM Recovery mode;

2-downloaded cwm-lgog_e977-brazil_10b-modem.zip from the EFS and MODEM backup/restore tutorial and flashed the modem zip package (replacing the modem.img with the one from my phone extracted with adb) ;

3-flashing stock firmware;

But still null IMEI and no network signal. Is there anything else I can try? Maybe if I get a specific file from another E977 model?

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ksio89 said:

Yeah, I flashed stock firmware and performed a factory reset, it was clean. Then I proceed to root, install FreeGee, BusyBox and then CWM 6.0.4.7 and then flashed the CM11 M5 ROM, has been stable for a while, then it crashed. This is the report:

"DemiGod Crash Handler : Subsystem Crash! : External_modem (Undefined error)"

BTW, I performed a backup of EFS partition 3 img files with FreeGee.

I had to flash stock firmware once more due to crashing, it's completely unstable with CM11 M5, I'll flash CM11 M4 which was perfectly fine and see if it becomes stable.

EDIT: still crashing with CM11 M4, the latest CM ROM really screwed my phone.

EDIT 2: sent my phone to local repair service and the main board was replaced, with a new IMEI. It seems there was indeed a hardware issue. I had a SIM card which I had it adapted into microSIM format but it wasn't recognized by my OG. After the motherboard replacement, it's being recognized now. I have backed up EFS partitions and modem packages following the tutorials on Q&A. But I'm enjoying stock ROM, it has some nice features which I didn't find in CM11, I'll stick with it for a while. I don't believe there will be any more issues regarding CM11 though.

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