After you get to the store, you are very likely to be asked to do a hardware diagnose (which unlikely any errors will occur), then you'll be adviced to restore and wait a week.To modify the above (and soften the blow a bit) – I got a voicemail with different instructions: they recommend I bring the phone into an Apple Store for "inspection and additional troubleshooting." Not the most convenient thing to do, but I suppose better than what was at the link they sent.