IOS5 Beta 7 Invalid Sim Issues

So this morning I did an OTA update to Beta 7, and since then my iphone has been flashing up an invalid SIM message, the sim has been working fine since I got the phone and it's only since the update that it's messing up. I tried restoring to different firmware, re-seating the sim and every other combination of fixes that I could find.

Anyone have this happen, if so how can I fix. Also if not if I take it to a genius tomorrow, will they be able to help me considering it's an IOS5 device? It's never been jailbroken or anything and is a registered IOS developer device.