This tutorial will learn you how to fix "not registered on network", wrong IMEI for :
Flashing instructions :
1- Run "Odin3" as administrator, Click on PDA button and navigate to Modem.tar.md5 file that you extracted.
2 - Shut down your device and make sure your device is completely off
3 - Put your device into download mode by pressing and holding (Volume Down + Home + Power) buttons
4 - Press Volume up to continue
- Connect the device to your computer by USB cable and wait until you
get a sign in Odin (ID:COM section) and "Added" in message box.
6 - Make sure re-partition is NOT SELECTED
7- Click Start and wait a few seconds until you see "PASS!".