Bought launch morning. Spent awhile with Apple, cellular wouldn't activate, sent from Apple store to TMobile kiosk. TMobile swapped out sim cards, reseated, reset, talked with their techs. Remotely activated and said might take 2 hours. Off to catch my NYC flight. Talked to tech support, TMo and Apple while killing time in the terminal. No success. Visited a TMo store in NYC, no success. Visited Grand Central Station Apple, Wow. No success, no success with a replacement. Got a complete refund and wrote off iPad. They called back yesterday. Local store wanted to make right. After some activation hiccups, success!