Originally Posted by ndub33
It won't work. The Tour is a CDMA device and ATT is a GSM carrier. two completely different technologies in play here.
Your best bet is to wait for a Tour equivilant to be released by a GSM carrier. Then you could get it unlocked for use with ATT.
It will work fine.
The Tour is a CDMA/GSM hybrid, similar to 8830 and Storm.