If traveling to the U.S. i recommend getting the add-on that supports connectivity in the states. If travelling outside of the states I recommend getting an international "phone credit" by a reputable company such as CiCi. Can b found in most conveni...
1) You need to make sure your mobile device supports 4G connectivity.2) You need to be in a specific region that supports 4G connectivity.3) In some cases, 4G connection m ay not be enabled on the device.
