FAQ

"Out of service" on iOS phone.

If the current iOS version is before iOS12, the service may be displayed as "Out of service area"
Please update the latest iOS version.

How can I request for data package change, payment method change or contract cancellation?

The procedure can be requested via GTN MOBILE App
Since each procedure has a deadline for application, please check the explanation in contract terms and conditions for more details

Why is my phone bill is so high this month?

Call charges may had been occurred.
For details of monthly bill, please use GTN Mobile App or check Invoice email
For more details,click here..

How do I check the call history for this month?

For inquiries about call history, please contact us directly. Basically, you can check the call history after 2 months, but you can check the estimate depending on the plan, so if you have any questions, please contact us once.

When I change my plan, can I use the new plan immediately?

In case of changing data plan, please contact us in advance. The plan will be applied from the 1st of the following month or the month after, depending on the timing of request. Different plans have different request deadline. For more details, please check contract terms and conditions

Can I change from GTN Mobile Lite plan to GTN Mobie Advance 5G?

Except data package change, any service plan change will require new phone number contract.
Please contact our support center for more details.

Would you like to send a notification email after payment?

We will not send you a notification email after payment.

What should I do if I return to my home country permantly or temporarily leave Japan?

Please note that the basic fee will still be charged as usual even when you don't use the service.
In case of permently leaving Japan, please contact us for contract cancellation.
For more details,click here..

How much will I be charged if I exceed the contracted capacity, can I still use it?

If you exceed the capacity limit of each plan, there will be no additional charge, but we will limit the speed. The speed limit varies depending on the plan.

Can the remaining data be added to the following month?​ ​

No, the remaining data will not rollover to the next month. Data will be reset on the first day of every month.

How can I check the remaining data?

Currently GTN MOBILE App is still in the process of upgrading。We will inform you on our website as soon as it is completed. In the meantime, please contact our support center to check data balance.

Can I add additional data?

Currently GTN MOBILE Appis still in the process of upgrading。We will inform you on our website as soon as it is completed. In the meantime, please contact our support center to request.
For more details, please visit "Service Plans" page on our website

Can I verify my age on LINE?

No. All GTN Mobile plans do not support LINE age verification.
Please use QR Code method to add friends on LINE instead of using phone number.