オンリーサービス マイページ（ONLY SERVICE）

■ Check Usage Charges Check your billing history. ■ Check Contract Details Check your contract details. ■ Check Data Usage Check your data usage for the past three days, the previous month, and the month before. ■ Change Payment Change or update your registered credit card. ■ Check Customer Information Check or change your customer information. ■ FAQ Check FAQs for troubleshooting help. ■ Other Useful Features ・Change Login ID ・Change Password ・Subscribe to Optional Services *To use this app, you must have an ONLYSERVICE contract. App Environment This app is compatible with devices with our service contract and the following operating systems. (As of February 19, 2026) Android 8.0 to Android 16 *Even if you are using one of the above supported operating systems, it may not function properly on some devices. We apologize for any inconvenience. *Please note that support for Android versions earlier than 8.0 (7.x and earlier) has been discontinued. We apologize for the inconvenience, but for customers using devices with Android versions lower than 8.0, we ask that you either upgrade your OS or use a different device with Android 8.0 or higher.