You may have to download AT&T's software for the phone to hook up with AT&T's internet or m mode. Check out AT&T's website - look for a developer's forum.
i have an unlocked cingular motorla v400 cell phone. but my plan is with at&t. when i try to go online it says connection failed. try again later. is it just down or can i cannot go on cause my internet is with at&t. i basically just want to dl ringtones. are there any other ways i can get it without going online? or can i get on m mode ne way else?