Hi All, Apologies if this issue has already been discussed, I've searched the various threads and couldn't find anything directly related to the iPhone 4, only older versions. The problem I'm having (along with a few of my work colleagues) is that someone tries to call the phone, it doesn't ring but we get a text message alert within seconds from the network operator telling us we'd missed the call. Strange thing is, we're running iOS 4.0.1/4.0.2 and have a full signal so there shouldn't be any reason why the call wouldn't come through to the phone. I wondered if it was to do with the network around our offices but it's happening wherever we are in the country. Anyone else experiencing this issue and has anyone found a solution? It's not the infamous antenna issue as the phone is sat on my desk when this happens (with a bumper on and nobody holding it). I've tried all sorts of things (as mentioned in previous posts related to 3GS and earlier) but none have worked (full restore with back up, full restore as new phone, reset network settings, changing Exchange email to Fetch every 30 mins). Any suggestions on how to resolve this would be very welcome as it's becoming a real pain in the backside.