We have stopped accepting new applications for the Mobile Basic Plan SS as of October 2, 2023. Current customers can continue to use the plan after October 3, 2023.
Details of the mobile phone plan SS that is accepted until September 30, 2019
Prices shown include tax unless otherwise stated.
The amount may differ from the invoice amount due to the calculation of consumption tax.
You can enjoy high quality calls at a reasonable price by paying only for the packets you use.

* If you use a flat-rate packet plan, the Basic Pack (monthly330円) is required.
Basic Pack/Packet Flat Rate
Recommended models
- <Basic Pack/Packet Flat Rate>
- ●If your data usage exceeds 2.5GB in a given month, your data speed will be slowed down (up to 128kbps for sending and receiving) until the end of that month. To return to normal speed, you will need to pay an additional 0.5GB.550円*To apply to return to the normal speed, please set it up on "My Y!mobile" or contact Y!mobile Customer Center (this will only apply to the current month).
- ●If you apply for "Auto Charge (Comfortable Mode)" which always maintains the normal speed, you can continue to use high-speed data communication without slowing down for the additional data capacity you set even after exceeding the specified capacity. However, the additional data capacity you actually use will be charged.550円A usage fee will be charged per use.
- ●If you sign up for or cancel the Basic Pack during the month, the monthly fee will be calculated on a pro rata basis. If you cancel the Basic Pack and cancel at the same time during the month, the fee will not be calculated on a pro rata basis.
- ●If you sign up for a flat-rate packet service midway through the month and sign up for a new contract, the monthly fee will be calculated on a pro rata basis. If you sign up for or cancel a service midway through the month, the fee will not be calculated on a pro rata basis.
- ●If you are using the Mobile Basic Plan SS and you change your phone model to a smartphone, the new plan will be applied from the following month, and the packet flat rate and basic pack of the Mobile Basic Plan SS will be applied in the month of application. (The packet flat rate will be applied even if you did not use data communication before changing your phone model.)
- ※The monthly fee for the Basic Pack will not be charged from the date of your model change application until the end of the month.

Basic fee
Mobile Basic Plan SS |
1027.4円/month |
- ※If you sign up in the middle of the month, the monthly fee will be calculated on a pro rata basis, but if you cancel in the middle of the month, the fee will not be calculated on a pro rata basis.
- ※A contract administration fee will be charged for new contracts, model changes, and contract changes. (There is no administration fee for online stores.)
- ※A universal service fee will be charged separately.
Universal Service Charge
Call charges, email sending charges
Y!mobile, SoftBank, and LINEMO smartphones and mobile phones |
To other than the above (smartphones, mobile phones, and landlines of other companies) |
1:00-21:00 |
9pm to 1am |
0 yen |
Per 30 seconds22円
 |
Per 30 seconds22円
 |
Email |
Y!mobile email |
MMS |
SMS |
0.0055円/packet *This will be counted towards your data usage. |
[Send] per email3.3円 (Reception is0円) |
- ※When making international calls or sending international e-mails overseas, normal international service calling and communication charges will apply.
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