Samsung Galaxy S3 How To Backup And Restore Samsung Galaxy S3 Imei Without Root



INSTRUCTIONS:
1) Download NV reader/writer [Only registered and activated users can see links. ] and install [Only registered and activated users can see links. ] drivers.

2) Dial *#7284# and select "Qualcomm USB Settings" then check "RMNET + DM + MODEM".

*If you are running a aosp rom (cm9*cm10*aokp etc) you can use the diag method described [Only registered and activated users can see links. ]

3) Save item 00550 with NV reader/writer. You can write the backup directly back to the phone. This backs up your IMEI only.

*If you want a FULL NV backup read the phone with the default values [Range (Dec): 00000-65535].

4) Dial *#7284# and select "Qualcomm USB Settings" then check "MTP + ADB".

Demonstration video [Only registered and activated users can see links. ]
IMEI ALREADY CORRUPT?

1) make a backup of item 00550 like described above and open with your favorite text editor.

2) Separate your IMEI (find it behind the battery) into blocks of two but with the first digit alone* like this-

353022050234285
=
3 53 02 20 50 23 42 85

3) Now add an "A" after the first digit then reverse the two numbers in all the other blocks* then add a 08 to the beginning. Like this-

3 53 02 20 50 23 42 85
=
08 3A 35 20 02 05 32 24 58

4) Now replace the first nine values in the NV block with your converted IMEI and save the text document.

5) Write the NV back to the phone and then reboot.