"Requirements for prepaid wireless plans with AT&T branded phones:
You have had AT&T service for six months or longer
You can provide a receipt or other proof of purchase"
The last line illustrates how carriers are dictating policy in an effort to subvert the secondary phone market.
Even more frustrating in the same link you will see that certain AT&T phones are "ineligible" for unlocking presumably due to some arbitrary restriction.
http://support.t-mobile.com/docs/DOC-1588
AT&T prepaid is much worse:
http://forums.att.com/t5/Prepaid/Unlocking-PrePaid-Phones/td...
"Requirements for prepaid wireless plans with AT&T branded phones: You have had AT&T service for six months or longer You can provide a receipt or other proof of purchase"
The last line illustrates how carriers are dictating policy in an effort to subvert the secondary phone market.
Even more frustrating in the same link you will see that certain AT&T phones are "ineligible" for unlocking presumably due to some arbitrary restriction.