I have heard with their GSM service this is true. I can't say about at&t GSM, the at&t service I had was years ago and when I changed as at&t didn't like me roaming on other carriers so much I changed my service to GTE and never had bad service with them.LOL... personally, and family plan wise, I have never seen so many dropped calls from cell phone provider as I did with AT&T. That was enough in a major metro area to make me drop AT&T after only ONE two year contract... never looked back and never wanted to go back, AND NEVER will go back.