Bought an iPhone 3G a few days ago and it doesn't get a signal. I'm in the UK and the carrier is O2. There was no sim in the iPhone so I got a new O2 sim. I've placed it in the iPhone and I get a message saying it's trying to activate the sim but it fails as there are no bars on the signal. I've tried the other suggested items in the forums such as: restoring the iPhone to factory settings, Trying various sims. I didn't notice at the time of purchase but the chrome side is not fully connected with the rest of the iPhone. I'm aware that the iPhone uses the bezel as an antennae and if mine isn't connected correctly then this may have an affect on signal strength. If there are any solutions could you please let me know. Thanks in advance.