follow下面的步骤即可，注意打的电话不是800，也不是611.
I have important information for those of us who have service with AT&T.
There is a more straightforward and easier way to get any AT&T or Cingular
GSM phone unlocked.
If you have had service already established for at least 90 days, then you (
and any other AT&T customers) can do the following:
1. Call 916-843-4685. This is AT&T International Customer Support and is
free from any active AT&T handset (it does not count against any night/
weekend/anytime minutes)
