i'm having the same problem! i live in east yorkshire and i'm on vodafone, and since yesterday morning i've had no signal whatsoever. i normally always have full signal usually wherever i am but since yesterday i can't get any anywhre! i've taken out the sim card put it back in switched my phone on and off but nothing's happened. i know quite a few people who are on vodafone and have full signal. i was wondering if there's a chance i've broke my phone? or if it's just vodafone?