The Roamer app aims to help you get rid of most of your roaming fees when traveling. Available for iOS and Android smartphones, the app leverages call forwarding to cut your roaming fees by up to 90 percent. Using Roamer, you can receive calls from your native phone number while paying minimal fees.
To use the app, all you have to do is a little setup before and after you arrive at your destination. Before you leave, just install Roamer and 'park' it by forwarding calls to a number assigned to you. When you get to your destination, you can buy any domestic SIM card and use it to start making cheap calls. Roaming credits can be bought directly from Roamer.