This is from the TomTom site.
AT&T/Cingular:
Motorola RAZR V3, Motorola RAZR V3i, Motorola ROKR E1, Motorola L6, Motorola L2, Motorola RAZR V3xx, Motorola SLVR L7, HTC TyTN, Nokia 3650, Nokia E61, Nokia E62, Nokia 9300, Nokia 9300i, Nokia 7610, Nokia 6230, Nokia 6820, Nokia 6820i, Nokia 6131, Nokia 6681, Nokia 6103, Sony Ericsson W550i, Sony Ericsson Z520, Sony Ericsson Z525, Sony Ericsson Z530
T-Mobile: Motorola PEBL U6, Motorola RAZR V3, Motorola RAZR V3i, Motorola RAZR V3t, Nokia 3650, Nokia 6600, Nokia 6131, Nokia 6103, Nokia 5300