Now You can call to other countries with your Gp Sim free

1।First go to the 'Google Play Store' and Download the latest version of 'Messenger' 
Link:  Play Store Link
2। Then Download 'Hotspot Shield Ellite VPN Pro APK' and install it on your device
 Download Link
3। Now  go to Setting>Apps>Messenger>Clear Data and press 'clear data'
4। Connect your device through Data Connection or Wifi...
5। Hotspot Shield Ellite VPN Pro > USA Server > IP HIDE..
6।Now open Messenger and you will see a Call Button/icon.Now tap on it and talk free...

Screen shoot:




Thank You.... ;)