Hi @liranbel!
I can certainly help you out with that! What a great question! Are you currently traveling abroad and wanting to use your phone? Where are you currently traveling?
At the moment, GoPhone services can only be used internationally in Mexico and Canada. If you are planning on traveling to the US, you can activate the service once you are on the AT&T network.
You can check out GoPhone plans through the website and see what best fits your needs.
Take care and have an awesome week!
Tim, AT&T Community Specialist