I did the sw unlock on my iphone to in order to use tmobile. However, it seems the Tmobile reception in my area is pretty lousy. I've decided to go back with ATT for their better coverage . I am not sure how I can re-activate my phone in ITunes because itunes now considers my iphone is activated, thus there is no way for me to re-activate it directly.

Will a full restore help? Thanks!

BTW, thanks for the great work, dev team!