Do you want to use Kakao, Skype, or LINE app to call your friends but you have a bad connection? Did you lose your connection because you passed through the subway? Are you in a location that is out of network range? This application is the perfect solution for your needs.

It is very useful and convenient to use. You can just simply tap the "Radio Wave Recovery" button and the radio wave will be restored instantly. It re-receives radio waves in places with radio waves and acquires it by switching your device to the airplane mode between On and Off.