. "it is not a ROM related issue, it displays accurate phone number on one of my SIMs and other displays 'unknown'.recently i tried to get my location on google maps with gps ( without any internet connection) , and i was unable to do so.then i installed gps test plus and when i enter the app, it shows that gps is rendering information from around 10 sattelites but even after standing still for my loc" . . .