My mistake. I was thinking about the iPhone 4. Which is basically what I do all the time
🙄
2G Network: GSM 850 / 900 / 1800 / 1900
3G Network: HSDPA 850 / 1900 / 2100
http://www.gsmarena.com/apple_iphone_3g-2424.php
I would expect the iPhone 3G to work on any network using these standards and frequencies.