3G network problem.

[hamil]

I need some help regarding 3G network, I'm wondering why 3G network works only with reliance connection, whenever i inserted others connection like airce, Vodafone i never got 3G network and which is also happens in places where 3G network is available...

[Phy]

Is your phone compatible with those other carriers 3G frequencies

[Phy]

Are you able to access 3g frequencies while on safe mode?

How to boot on safe mode.
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008