This is my 4th SGS2 it had been working fine to 3 weeks then today this mouring i wake up no signal i thought fine maybe network down i check my mobile broadband (same network) that works try sim in another phone that works. but the SGS2 says emergancy calls only all the time tried reset re flash nothing, this is a very buggy phone and when i get that chance i will be exchanging it for a sensation but anyone got any ideas?