phone rebooting

[vikki123]

Im USing Xperia S lt26i

My mobile Automatically Restarts whn The Screen is off 

So i Root My mobile And Installed Gelly bean But Still Mymobile Restarts Continusly and Wifi Didnt Work

I tried repair My mob in PCC its shows Error 2003

SUS Shows Suport Has Ended Error Please Help Me

[Thommo]

Because you rooted Pc Companion will not work hence the error message

A common problem for this restarting is the SIM card so try removing the SIM card and test to see if the same happens