SCCall

This is a smartphone app that can connect to Rakuten Connect SmaCom provided by Rakuten Mobile. With SCCall, you can receive calls to your office on your smartphone and make calls using your office phone number from your smartphone. Calls between employees' smartphones are also free between SCCalls. (The application usage fee will be billed together with the Rakuten Connect SmaCom license fee. Also, data communication fees incurred during calls are required separately.)