Welcome to Mayumi

It is a cheap SIM with a monthly basic fee of 190 yen (excluding tax).

■ Recommended for such people
-If you want to reduce your smartphone fee a little this month, you want to control your monthly fee yourself.
-You can control the amount of data (monthly charge) by yourself.

■ About service contents
This product is for data communication only.

At the time of application, you can select a SIM compatible with docomo network or a SIM compatible with SoftBank network.
* You can select a SIM that can use SMS only for the docomo network version.


Up to 100MB: 190 yen (excluding tax)
From 100MB to 1GB: 480 yen (excluding tax)
From 1GB to 3GB: 850 yen (excluding tax)
From 3GB to 6GB: 1,450 yen (excluding tax)
From 6GB to 10GB: 2,190 yen (excluding tax)
From 10GB to 15GB: 3,280 yen (excluding tax)
※ After using up 15GB, it will be used at low speed.
* If you select SIM with SMS on docomo network, 130 yen will be added to the above monthly basic charge.


After contract, you can set the upper limit of data usage to any of 3GB / 6GB / 10GB / 15GB.
You can change the settings at any time on the customer-specific page "My b-mobile".
Exceeding the set limit will result in low speed usage.
* You cannot set the amount of data that is already used.
■ Start procedure
1. Purchase a package.
(Please check beforehand if your model and SIM are compatible.)
2. Apply on the WEB site. Email address and credit card required.
3. When you receive the SIM card, insert it into your device, set up your APN and start using it.

* Please read the notes carefully before purchasing.