Originally Posted by
Cloudship
Check your APN settings. Go to Settings, More Networks, Mobile Networks, Access Point Names. Make sure there is nothing in there that looks like ATT.
Thanks for the heads-up.
While I was in China & S. Korea, I didn't know what to check, and did nothing.
Now, I am back in USA, the APN setting is epc.tmobile.com (not ATT)
So is it necessary that I check and set the setting and leave APN to BLANK whenever I am overseas?