How to unlock Motorola Atrix 4G for other carriers?
If your unit was originally sold by AT&amp;T and the unlocking code provided by AT&amp;T did not work - then it means that the invalid unlocking attempts counter was exhausted on this unit. No other "unlocking service on the Internet" will be able to help you.

"Wiping the radio" option (i.e. flashing incompatible baseband processor software, so it would reset internal settings including subsidy lock) would also wipe out the unique phasing (i.e. calibration) data from the unit - which would result in degraded signal reception.

The bottom line... if I were you - I would ask for my money back.