Rakuten phone is call app that can save the smartphone of callcharges by using a telephone line number as it is.

This is an app that allows customers who are subscribed toRakuten's strongest plan to easily and conveniently check datacommunication and usage details, perform various procedures, andmake inquiries.

Scan QR code for easy connection to your Rakuten Casa Wi-Fi

IP phone app that 60 percent cheaper call charges of smartphone"SMARTalk"! I use the 050 number at 0 yen monthly basic fee.