Have you tried reverting to factory recovery, if you are not rooted. If rooted you may need to unroot first and do a factory recovery but ensure you back up your personal data and APN settings to your pc first.
Sent from my GT-P7500 using xda app-developers app
---------- Post added at 08:10 PM ---------- Previous post was at 07:36 PM ----------
Have you tried reverting to factory recovery, if you are not rooted. If rooted you may need to unroot first and do a factory recovery but ensure you back up your personal data and APN settings to your pc first.
Sent from my GT-P7500 using xda app-developers app
I tried to unroot and reflash stock rom, but didnt work.
It was unlocked with Galaxy Tab unlock