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.
Yes it can be used.
yes you can
Yes
If there are towers yes.
Apple is an internationally successful company.
yes the iphone is easy to use!
how to use vocalive in iphone first time
you do not ( you can not do that )
no you can't
cod
Not anymore. A new law was passed and you can no longer use debit cards internationally. If anyone knows of a way to get around this, please edit this.
yes, you can just use wifi access to use the Internet on your iPhone
yes
will an iphone 5 will use nfc
not yet, but it will be coming out soon for the iPhone