Sure ! If you use a data only sim , especially say a Freedompop global data sim my app makes it easier to use google hangouts to make all your phone calls . If you are unfamilar , google has a service called google voice which allows you to have a phone number tied your google account that you can text and receive calls from for free . You can use Hangouts to make and receive calls and text with your google voice account . Where my app comes in is Hangouts doesn ' t play nice with FreedomPop global and attempts to prefix the UK country code to all phone calls , my app prefixes the correct country code for most that will be the US country code and even your default area code if not entered . In addition my app will send any calls made through your regular phone dialer , contacts app , or bluetooth over to hangouts and then automatically place the call . This makes handsfree calling easier and helps prevent issues with global sims and hangouts . Making using Google VoiceHangouts as your primary calling service a much more user friendly experience .