I assume so as I use At&t service with it. Why?
There are no stickers whatsoever on the battery or the phone. It's an LG620G, division of Trac Phone with At&t Service purchased thru the Walmart "Straight talk" program and the E is still in the top left corner. Some symptoms of problems are that navigation is delayed by a full second after pushing a button. Secondly, lately the battery seems to drain faster and a once the other day it never seemed to take a full charge. I seem to be experiencing more "dropped calls" than normal and the other party says that there are dropouts during our conversation. Does this information help? Thanks