My iphone 4 is having a problem where I have full strength signal and '3G' (XT network) is displayed in the top bar yet when I try to use cellular data nothing happens.
Ive had my IP4 since release and this issue has only happened 3 times but its annoying as it lasts for about an hour and anything i try to do doesn't get 3g data going=restart phone, off/on phone, turn phone to airplane mode, off/on 3g data switch.

It seems to start working by itself after about an hour. 
While this is happening the phone goes through A LOT of battery power (40% maybe) even though im not doing anything. maybe theres some background process thats stuffed up?

I dont think its XT going bung.

Should i try restoring phone?