mobile

I m having S3 Neo (Model GT-I9300I) Andriod Kitkat 4.4.4 installed, purchased on 17/02/2015 now I m facing the restart problem in my Handset. I have tried all the things. Like Reset the Phone and Manually reset the Phone. Put the phone on Safemood but the problem is still coming. I have also tried through KIES SAMSUNG software and update the Firmware. But no solution I got.
Please help