Many of us would love to use our smartphone without worrying about roaming fees. VoxEra is a gadget designed to address that. Simply put your SIM card into the device, and you will be able to make calls using the VoxEra app over WiFi or data. This service is based on a standard GSM network.
The service works over any type of internet connection. It can forward incoming calls to your number in the country you are traveling if you don’t have an internet connection. Expected to ship in June.