Amigo (soldiers only) is an app that can also be used as a mobile phone with a smart payphone placed in a large area.When you install the application, you can register your subscription and contacts stored in your mobile phone conveniently by linking with the smart pay phone available in the military.Easy and quick membership / add friends / card registration, enlistment, and even call at home, even when you go out and stay out, please contact the green fee!● Main functions:- Video / voice call service- Free text chat service- Postpay card registration- Point charging- Global day calculator● Inquiry - Amigo Customer Center: 02.501.3496