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Yes you can wherever AT&T has roaming partners. It's kind of expensive though, depending on what country you're in. You can sign up for the International Traveler Plan so you can get it at a discount.
You will want to call AT&T to verify that you are on an international plan to prevent unimaginable roaming charges- however, the iPhone is a Quad-Band cell phone, and can be used on cellular networks around the world.
What else can I help you with?
Does an iPhone 4 through Verizon work internationally?
If there are towers yes.
Can I use my passport to fly internationally?
Yes, you can use your passport to fly internationally.
Can you use your passport to fly internationally?
Yes, you can use your passport to fly internationally.
Can you use an expired passport to fly internationally?
No, you cannot use an expired passport to fly internationally. You must have a valid passport to travel internationally.
How do you use the word internationally in a sentence?
Apple is an internationally successful company.
Can you use a passport to fly internationally?
Yes, a passport is required to fly internationally.
Is the iPhone easy to use?
yes the iphone is easy to use!
HoW do you use vocalive on iPhone?
how to use vocalive in iphone first time
How do you use an iPhone to tap into another iPhone?
you do not ( you can not do that )
Can you have no Internet for the iPhone but use WiFi for Internet?
yes, you can just use wifi access to use the Internet on your iPhone
Can you use ooVoo on the iPhone?
not yet, but it will be coming out soon for the iPhone
Can you use the charger of iPhone 4 in iPhone 3gs?
yes
