About Voice Call function, as this is an IP Phone service so you will need to make calls through an app – “Cloud Softphone”. Please note that the numbers for SMS and Voice Call are The number for Voice Call starts with 050; the one for SMS starts with 070, 080 or 090.
To be able to get a sim card with the lowest cost simply without worries about registration procedures and binding contracts, connecting calls through the internet is necessary. Because this Sim card service is suitable for people who have more demand for using the internet than making calls.
You can download the application *Cloud Softphone*, check the 050 Voice call number, as well as the password for the voice call app by logging in to My Page: https://user.jpmob.jp/en/users/mypage
If you find any difficulties while using the Softphone app, kindly refer to this instruction for more tips and solutions: Cloud Softphone Setup instruction
***050 Phone Number Voice Call option is not available to Data Only Plan users. If you need to make calls, it’s necessary to upgrade your plan to “Data + Voice Call 050”. There will be an additional 300 yen/month of basic charge for the Voice Call option***