I have Samsung Galaxy S3 and I have recently updated Android version via Odin 3.09. I have used that website to get android system software (or whatever it's called):
with version 4.3 dated on 16.01.2014 for region 3IE (Three, Ireland)
After that I have noticed "Not registered on network" message when I tried to call someone. I have also noticed that my IMEI number has been changed to:
35371xxxxxxxxxx (x is new numbers comparing with imei number under battery)
I hope I have provided enough info about my problem.
Is there any idea to fix this?