可以。

老乡好。注意 AT&T 的电话解锁后不要更新软件，否则会重新锁上。

SIM CARD 也可以在美国买。

 

1. WorldSIM - FREE INTERNATIONAL ROAMING

   www.worldsim.com/ 

   WorldSIM is an Award-Winning prepaid SIM card which allows you to make and receive international calls on your mobile without incurring expensive charges ...
   

   Log in or Register your SIM Card - Recharge / Top Up - Multi IMSI - Contact Us
2. Amazon.com: Mobal GSM Global Roaming World SIM Card: Cell ...

   www.amazon.com › Cell Phones & Accessories › Sim Cards 

   Mobal GSM Global Roaming World SIM Card, +, OneSimCard International SIM Card for Over 200 Countries, +, Samsung E1080 Unlocked Dual-Band GSM ...
   
3. International SIM Cards from $5, International Cell Phones from $19 ...

   www.telestial.com/ 

   Getting started is as easy as selecting a GSM world cell phones and a Prepaid service pack (SIM Card) for your next destination.
   
4. International SIM Card | Prepaid Roaming SIM from OneSimCard

   www.onesimcard.com/ 

   International SIM card with free incoming calls in 150 countries. ... One Sim CardInternational Mobile Rewards Program ... Global Concierge and Translation ...
   

   International SIM Card - Rates and Coverage - FAQ/Help - Contact Us
5. International SIM Card from Mobal - Ideal For Travelers.

   www.mobal.com/international-gsm-sim-card/ 

   Jump to World SIM Details‎: 1. Mobal International SIM Card details. World Sim Card. Mobal® World. Sim Only Option. Works in over 190 countries ...
   
6. World SIM Card. Save 66% on voice, text & data in 200+ countries

   www.brightroam.com/World-SIM-Card-P26C0.aspx 

   Jul 23, 2012 – The World SIM Card for North Americans. FREE until July 31. Save up to 66% phoning home from 200+ countries. Data plans. No contracts.
   
7. Sim Card Global | International SIM cards | Prepaid GSM

   www.simcardglobal.com/ 

   SimCardGlobal mission is to reduce the cost of mobile calls, SMS, data and email for international travelers. With no roaming fees our rates are significantly ...