Thanks Meter 231
Join Date: Nov 2013
Location: Bandung, Indonesia
You might want to try one of the AOSP-based ROMs (CM11/Slimkat/Carbon/Omni/ProBAM) and see if it fixes the issue. If it still reboots even after installing one of those ROMs, then you probably has a faulty hardware. If it stops rebooting,then you probably has a corrupted installation of stock firmware...
Faulty hardware = get it to a service center, but be prepared to pay some bucks because you have already lost your warranty...
Corrupted stock firmware = try to flash the firmware again via Odin but DON'T RESTORE ANY BACKUP. If it still reboots, redownload the firmware package and reflash.
I'm not an expert, but I figured that your phone is already unusable by constant rebooting... let's just solve it by trial and error.
An architecture student and likes anything tech.
Nokia N-Gage QD (2006) --> Nokia 2730 Classic (2010) --> Ivio DE88 (2011) --> Sony Xperia Go ST27i (2012) --> Samsung Galaxy Grand Duos i9082 (2013) --> (used) Sony Xperia V LT25i
Rocking Sony Xperia V with latest CM11 nightly.
Secondary device: white iPad 2 64GB, with jailbroken iOS7