if i need to use internet I have to switch off the device and switch it on again, then enable mobile data. It is really annoying to do this every single time I need to use internet. any solution?
What happens when you enable data without rebooting? May be some third party app in the background is interfering with data access. Try running your phone in safe mode: http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008 If you don't face any problems in safe mode, then some third party app like battery saver or task killer is causing the problem. Uninstall it, reboot and then try enabling data.
