The best phone for international travel? {Gadling}

Nov 20th 2008 10:08AM There are no data charges when using wifi calling. Charges would be incurred if you have to pay for the wifi service that you are using. If it is free, then no chargeg. If you have a T-Mobile plan and want to have unlimited wifi calling, it is $9.99 per month. If you don't have that add-on, minutes will just be taken out of your plan like normal.
WORD OF WARNING!!!
If you are roaming internationally, you will be able to call the US using UMA according to your plan, but if you try to call your next-door neighbor in the foreign country, you will be charged international long distance charges! This service is great, but it treats your call as if you are calling from the US.

Another excellent idea for you if you want to stay in touch with family/friends in the US after moving abroad, is the T-Mobile@Home service. If you have broadband internet service at your new residence, you can add T-Mobile@Home to your current T-Mobile plan for $10 per month, and it will give you a "landline" that can make/recieve unlimited calls to the US using your broadband connection.

The T-Mobile@Home add-on is separate from the Hotspot@Home, or whatever they are calling it now, add-on for mobile phones.

Hope this helps, let me know if you have any other questions.