I was in San Francisco this past weekend, and my network services were severed sharply compared to the connection I get here in Austin TX. I was unable to get emails or use the internet and every other time I tried to make a phone call, I kept getting "Call Failed".
The problem was so bad that when I was in SFO, I tweeted something to the tune of "My POS iPhone never works when I need it to", to which an ATT Rep (apparently ATT has people scouring Twitter for angry ATT customers) responded with
http://twitter.com/ATTJason/status/3676354487 .
When ATT loses its contract with Apple, I'm dropping their POS network for a more reliable carrier with a better network and more helpful customer support. (Ever had an ATT rep call you a horses ass on the phone? They did to me back in June, to which they ended up giving me 2 months of free service to apologize)