When I came in US, i brought my 2 cellphones ive been using in manila, a SE P910i & Nokia 6680.. i went here in US last apr ... and any of that 2 phones doesnt supported by cingular... bcos my fiance is a cingular subscriber. That 2 phones i had as i knew is unlock or "open line" that is u cud used any sim into that, bcos when im in manila i switched using smart to globe or visa versa on those two phones. And when i checked cingular website they dont have such kind of phones. IM just wondering, i knew those phones were tri-band and GSM capable. when i insert smart prepaid roamed sim here in US i got a T-mobile supported network.


And cingular cant say anything about it, just weird.. and they saying i need to send it back to Manila to checked it. surely it is unlocked bcos its open line, bandwith is i guess fine too bcos my SE P910i is a kinda pda look alike and my 6680 is like a 3G phone.

anyway, im just wondering if anyone have some thoughts for this i could survive for, bcos i dont have nothing to use for these phones here in the US. i end up buying a cingular phones and i didnt like much of their packages, that international texting or calls are not inclusve to you subsripcted plans, which is very far from manila

gud day!
rebelheart

The problem is your phones are tri-band, and not quad band. Cingular is mostly using the 850 band, and your phones dont have it. Therefore you have to roam onto T-Mobile's network on the 1900 band. And Cingular is cancelling that roaming agreement in many markets, because it bought AT&T. (Tri-band phones in the US have 1900/1800/850 and everywhere else they are 1900/1800/900). I dunno if they do anything weird with their pre-paid SIMs, but I've used cingular SIMs just fine in phones I didn't buy from cingular.

Welcome to the fun that is the backward US cell network.