Okay, about 30 mins ago, I just picked up a call and suddenly it went dead. Assumed it was my friends sh*t iPhone 4 disconnecting him again, but turns out it was me . I quickly realised there was a cross through the signal bar and it said emergency calls only. It took about 3 mins before the signal returned. I live in central London and the area/house normally has excellent signal. This also happened about a week ago. I didn't pay it much attention the first time, just thought it was a one off, but now its happened again I'm concerned there is some issue. Anyone else on (on Vodafone or not) and having this issue?