iPhone 4 not getting any signal!
Hi
I have an iPhone 4, iOS 4.3.5
It's not getting any signal, it just shows _ _ _ _ next to the O2-UK sign. I can't make calls, it just says call failed immediatley. No texts either.
The 3G works fine, so something's working in there.
I've tried hard resetting, erasing the network details, removing the sim... Nothing works, please help!
The phone is still in warrenty, but I do not have the proof of purchase. Will I be able to have it serviced?
Thanks
iPhone 4, iOS 4.3.3