im thinking about gettin gthe iphone because my mom and i are getting one soon, because my dad has them for us but we dont wanna switch our carrier because AT&T isnt for us but theyre the only people who carry the ipohne. soo could it be possible to but a tmobile sim into a AT&T phone.

if tmobil carries that phone than yes but if not than no i tried it

No. That's because T-Mobile and AT&T use different network technologies. I believe T-mobile is GSM while AT&T is CDMA.