[Galaxy Note II Q&A, Help & Troubleshooting] nimraynn:
Hi,

I'm sure this has been covered many times but I'm finding little information that relates to the GT-N7100 or anything that I can actually get to work...

So, I'm new to flashing Android phones. This is my first Android device. I've messed around with ROMs on old Windows Mobile 6.1 and 6.5 devices before but not Android.

The problem I'm basically having is that my GT-N7100 no longer recognises quite a few system details, mainly the baseband version and the IMEI.

I'm not 100% sure where the problem first occured. What I did last night was:

Installed ODIN for Windows and flashed a root/recovery ROM to the device to root it.

Checked SuperSU was there, check. All good.

Tried to boot into CWM Recovery to flash a MIUI ROM. I got the Samsung Galaxy Note II GT-N7100 screen appear, followed by flickering like an out of tune TV.

After some Googling, found that I'd somehow got the wrong ROM for the GT-N7100, followed by a link to the correct one... so I downloaded that, flashed it, all good. I can now bootinto CWM Recovery.

Did a backup through CWM. Flashed the ROM, set it all up, then noticed I only had "Emergency Calls Only". Checked a few settings and everything looked OK. I did a bit of Googling and it pointed to checking the IMEI number.

Checked my IMEI and it came up as 004999010640000 which didn't look right to me. Tried pressing a few random buttons, nothing. Checked my box and that was definitely not right as my IMEI is 356000053********.

In a bit of confusion, went back into CWM Recovery and did a restore. This seemed to put the stock but rooted ROM back onto the device, clearing MIUI. Now I just have a circle with a line through it where the signal strength would normally be.

About Device says IMEI is "Unknown". Dialling *#06# brings up "null / null".

Now, I'm not sure where the problem occured, but I do remember seeing the circle with a line through it on the stock ROM before I flashed MIUI... so I've got a feeling it was the root/recovery that killed it.

I thought it did, but it turns out that CWM Recovery's backup does not backup the /efs folder, and even if it did, I've got a feeling it was fudged before I even got to that stage...

I have tried taking a copy of the existing /efs folder and pasting it onto my external SD card. I have then deleted the /efs folder, rebooted the device so that it regenerated the folder, deleted the nv_data.bin and nv_data.bin.md5, copied the .nv_data.bak and .nv_data.bak.md5 from the backed up copy and renamed them to nv_data.bin and nv_data.bin.md5 to no avail.

One guide suggested there may be a failed checksum error in the nv.log file, but there isn't a line that says anything about an md5 checkum error.

I tried one this morning that talked about using a hex editor to restore the information. I've done this again to no avail. I could see in the file that model number was correct when editing it, but no sign of an IMEI... but it was a large file...

I've tried a few other random bits and pieces that I can't remember, as to be honest, it was getting late and I was getting tired.

This is the information that my About Device screen shows:

Model Number: GT-N7100

Android Version: 4.1.2

Baseband Version: Unknown

Kernel Version: 3.0.31 -1071214 se.infra@QBAGENT177 #1 SMP PREEMPT Fri May 31 11:14:19 KST 2013

Build Number: JZO54K.N710XXDME6

Network: Unknown

Signal strength: 0dBm 99 asu

Mobile network type: Unknown

Service state: Out of service

Roaming: Not roaming

Mobile network state: Disconnected

My phone number: Unknown

IMEI: Unknown

IMEI SV: Unknown

The only thing I haven't really tried so far is just flashing a stock ROM to it. Not sure where to get this from to be honest either.

Any ideas what I can do? I have noticed while typing this that it doesn't seem to be registered a SIM card being inserted? It was last night... I did try booting with no SIM card and reinstalling the SIM, but it doesn't seem to pick it up now?

Any help would be great.

Cheers,

Mike.