Horrible app, just see the reviews. Most of the time I try to check data it says "uh oh something went wrong check back later ", it also lags 2 days or more behind sometimes, I can't make changes to my plan if I need too, everytime I try to access a specific part of my data it takes me somewhere else. Except for making my payment this app doesn't do much. I'd of expected better from AT&T because they have always given me outstanding service and they mention this app everytime I contact them.