Iphone 3gs randomly shuts down/restart with certain apps/sometimes not.

[keicee]

Hi.. my iphone randomly shuts down or restart during a certain apps/games. other games work. other games would shut down my phone or restart. i have tried to restore it. then tried using the same application that make it shutdown. same problem occurs. it shuts down/restart.then when i boot it sometimes im having a trouble booting it because it stucks on apple logo. and i have to put it in DFU mode. and rest it for about a minute then boot it again.
i dont know what seems to be the problem.

any help would be deeply appreciated thanks


Iphone 3gs
Firmware 4.1
Jailbreak using limera1n
not unlocked.
fix applied- tried restoring it again to 4.1 but having the same problem

[Simon]

It may be a hardware issue if it is happening after a restore. Did you set it up as new after the restore?

[keicee]

Yes i set it up as new. I guess i have to take it to a tech.