什麼手提可以在美國使用?sharp902得唔得?

if your 手提電話 3頻 GSM800/900/1900 you only can use T-Mobile, because T-mobile us GSM1900
http://www.t-mobile.com/
if you have 4頻 GSM800/850/900/1900, you can use T-mobile or Cingular. Because Cingular use GSM 850
http://www.cingular.com/cell-phone-service/welcome/index.jsp
they also have Verizon use CDMA and Sprint use PCS. this 2 company cannot use your own phone. SIM card is build in,
use which company is very depent on which city you stay. T-mobile or Cingular in CA is ok. In New York you have to have Verizon. I tried T-moble in NY, I almost kill myself.
If u come to US for over 1 year you don't have to bring your phone. they will give you a free phone when you sign one or two years AGREEMENT. but have to have a good credit. I understand HK 既手提電話 have more choice.
if you don't want to sign agreement, you can buy perpay:多數在唐人開的超市可以買一張當地電話卡,但要連電話號碼一齊買先打得,不是好多地方都有得買,要找好耐才買到, you need pay $20 to buy a sim card It have about 10 min, than you have to buy mintes with your credit card online/ by phone or buy refill card. Refill cards are available at over 90,000 locations in US. including T-Mobile retail stores, authorized dealers and other retail locations such as CircleK, Costco, Eckerd, Office Depot, 7-Eleven, Target, .....
$10/30min(30 days), $25/130min,$50/400min(90 days) $100/1000 min (1 years)
anymore question?
唔可以用 3G, 3G notaviliveable yet.

2007-02-25 11:00:48 補充：
Share 902 is WCDMA / GSM 900/1800/1900 雙制式三頻, because only have 1900 without 850, it only can work with T-mobile. Since T-mobile doesn't support 3G,you only can use it without vedio phone.

2007-02-25 11:07:33 補充：
If you already have this phone, you can bring to US. if you going to buy a new and you're stay in CA. u better 到美國 China Town 買. if u can sign one year contract, you can pick up one for free. and don't need worry about warranty.

2007-02-26 06:37:17 補充：
得, only 可以用 T-mobile, http://www.t-mobile.com/shop/plans/default.aspx?plancategory=4will you call a lot US number? Actually, If you just want to make some long distance call, I suggest you use 漫遊

You can use APP called "Your Buyer in USA US Buyer" at iTunes App or Google Play App. They will buy at US store and ship to you.