Hi guys, I've had my iPhone 4 since launch. Yesterday when I was texting a friend the text did not send, I thought nothing of it, putting it down to varying signal in my house (Usually happens). However, when I tried again 20 minutes later, it still wouldn't work. I went out side to try to get some signal, and got nothing. Now here is the strange part, the phone is saying I have no bars, but I'm still connected to O2 and can go on Edge/3G. O2 isn't down, as the rest of my family's O2 phones are working fine. Any help?