Originally Posted by rivviepop
Possibly you have a prototype that wasn't supposed to be on the street and sold? Take a look at your IMEI (should be listed on a sticker under the battery, etc.) -- does it start with 00? A proto has a special IMEI with those digits.
Note '001' for North America as per the link above. Maybe this is why your phone is having issues? Also, I *bet* (I don't know, just making an educated guess) that RIM has test PIN numbers as well, which might actually be the data problem. Take a look at your PIN -- does it look fishy in any way (all the same digit, some impossible pattern like 012345, etc.)?
This sounds like the most likely scenario. Either this, or the problem is so unique that they want to examine the device.