The exclusive news of AT&T's cash back for iPhone 3GS plan wasn't the only thing we received from our AT&T ninja yoTelefonoTresG yoTelefonoCuatro this morning.

Among other things we received the above flyer confirming a 7am store opening for AT&T locations on June 24th. Mark it on your calendars! Other things confirmed: existing customers can buy one iPhone 4 per phone line and new customers can only buy one iPhone 4 total.