Different countries use different types of mobile phone networks, so don’t assume that your phone will work abroad. And even if your phone does work for voice calling, some of its other functions – such as sending and receiving data or text messages – might not work. For most U.S. customers, the service plan that covers domestic usage does not cover usage while traveling abroad. And the rates may be much higher when abroad, because of the additional fees for roaming on a foreign mobile phone network. Check with your provider before you depart and ask them about other available options for international calling.
For more information on international calling for specific wireless providers, see our consumer guide.