These my second nexus , first one is messed up by null imei, no network showing unknown base band, i am amazed because i used toolkit to backup the imei on my system successfully before flashing the custom rom but when my phone's imei corrupted i tried to restore the imei back but no success. everytime toolkit shows successfully restore but the issue has not been solved till now. Plz tell me what is the proper way to backup & restore imei properly. how to prevent imei............ now i am scaring to flash my phone to custom rom...............i need help..............
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Okay, so a little background first- I accidentally format the /factory folder due to which my phone lost the IMEI number and couldn't register itself on the network. I have got that problem fixed from a local shopkeeper, though not sure what he did. Now I have a working phone with stock jelly bean ROM but whenever I switch the ROM, the phone loses the IMEI again and I have to restore the backup which I took after getting the phone fixed. I am able to flash new kernels but not the ROM. Is there a particular folder/file which I should restore from the backup after flashing the new ROM which would keep the IMEI intact?
Much has been written about the loss of IMEI when flashing a ROM. But I am stumped by my experience in recent days.
I live in China and have a rooted Galaxy Note II. It is the China Mobile version (N7108), but I was able to root it, deknox it, and add google apps which are not normally part of the Chinese version. It worked fine for months. Then I got on a plane to the US and forgot to turn the phone off. It had the dreaded circle with the slash. When I entered *#06#, it gave null/null. I did not alter a thing on the flight.
I waited a day, rebooting it often in hopes that it would work. But it has not.
The only thing that fixes the problem is to flash the phone with the latest Samsung firmware. But, as soon as I follow this up with flashing Philz recovery which I had before, the IMEI is lost again. I can't figure out how flashing the recovery image is altering the EFS or IMEI. The challenge I have is that I don't know how to backup the EFS without custom recovery and root. But adding root and recovery loses the IMEI.
Any ideas???
So I downgraded from 4.3 to 4.1.2. Everything works normal except IMEI which is and incorrect number. I backup my efs partition with my modem and restored it, and yet, it still fails to change to the correct number.
So I re-flashed stock 4.3 and IMEI came back again. When I went back a to 4.1.2 second time, the problem persists. What am I doing wrong???
SOLVED: Updated modem partition.
So these are the steps I tried to do, and would like to know if there is a solution out there.
I got a vs985 G3, with 12b
First I backed up my nv information, including my imei. Also saved it as a file which had it's ESN (XXE1ACEE) as part of the file name.
Tried to flash back to 10b with the tot Upgrade DL method, but got a factory reset status 2, so I flashed with Board DL method and got it to work, my IMEI was then set to 0000 0000 0000 000. Flashed back over my IMEI from my nv backup and got texting and internet back. But looking at the ESN from the program was XXA190EE instead of the original XXE1ACEE (I don't know if this is relevant, just including it).
When I go to dial the *#06# I get Connection problem or invalid MMI code.
I have done a factory reset, I have flashed a different rom, I have done another factory reset, I have flashed the 10b back and I have re-upgraded back up to 12b with another factory reset , I have gotten a new sim card. Anything I might be missing? I have done a search, but have turned up with not so relevant results or posts with no answers. Thanks
Followup for anyone else who has these problems, obviously the important first step is to backup your NV partition, I used QPST 2.7 Build 2402 Solcam before I started all this hockeyed stuff, so if you lose your IMEI and can't rebuild it you are proper boned. Back it up, and restore if necessary.
But to get back calling, texting, internet, and even better root ability use the KDZ method after restoring your IMEI, outlined http://forum.xda-developers.com/verizon-lg-g3/general/guide-flash-to-stock-10b-kdz-method-t2928140
After all my hair pulling it was simple and painless. Except the stress.
After flashing resurrection remix I got unknown baseband & imei number ,So there is no mobile network(cant make calls or use mobile data)
the first thing I did is I opened titanium backup(had no mobile service),It asked me for somthing like >>(restore your old imei to be able to install apps)
Tried restoring modem and efs with TWRP recovery backup, but no luck
When I try to *#*#06*#*# the dialer crashes .
Finaly after wasting hours I figured it out by downloading XXDM4 modem and flashing it ,restoring efs backup!