Galaxy S3 Tmobile to ATT now no data

[iwhiteout]

I have a t999 Galaxy s3 that I have been using on Tmobile for about a year. Today I switched to ATT. The phone works great but I have no data. I have been searching forums and on the phone with tech support and cannot find anything at all. Does anyone have any ideas?

 

[Rukbat]

You have to put in AT&T's APN. Bring the phone into an AT&T device support center if you don't know where to find it or how to do it yourself.

 

[iwhiteout]

Found the settings with a basic search and it worked perfectly. Also after being told by ATT that my data wouldnt work since it was a Tmobile S3. THANK YOU

 

[dan330]

don't u love tech support!