You have to call to stop service. The most you can do online is suspend service, which is not what you want.
If you are taking the iPad elsewhere for service, DONT cancel with AT&T, just port your numbers to the new carrier. Porting your numbers automatically ends service.
If you are taking the iPad elsewhere for service, DONT cancel with AT&T, just port your numbers to the new carrier. Porting your numbers automatically ends service.