I got an odd issue with my iPad. I put on flight mode while on a flight and when I got off and set flight mode off it says, 'you have no data remaining in your current plan' and the Internet via sim doesn't work at all.
I am away from home with no wifi access. I am on a vodacom micro sim prepaid with about 300Mb remaining. It's a 3rd gen iPad. I have tried several reboots as well as removing the sim and reinserting it. All don't solve the problem. I am away from my iTunes pc too so can't restore there.
Google shows this has happened to a few people but the American solutions don't work.