NifMo 半額ダイヤル is a service that allows you to make domestic calls at half the regular price by calling from a dedicated app on your Android device. Unlike IP phone services, it uses a regular phone line, so you can enjoy the same call quality as usual. The service does not require registration or a monthly fee. However, it is only available to individual and corporate members who use the "NifMo" voice call-compatible SIM card. The app's main feature is its automatic synchronization of your smartphone's phone book and call history, so you can start using it immediately without having to register new contacts. Please note that some numbers, such as emergency services), toll-free numbers, and navigation dial (0570), cannot be called through this service.