I have the same problem

I have a good guess of what is causing the problem.

My guess is that since ATT has no devices with 7.1, there must be some compatibility problem with the service books. When I downgrade to 7.0, the problem goes away. When I try 7.1 again, the problem comes back.

I think that the problem will be solved once ATT releases 7.1 officialy.

Thanks,

Everett