b-mobile: MNP procedure summary
| Provider | b-mobile |
|---|---|
| MNP One-Stop | Not verified |
| Reservation-number timing | Not verified |
| Primary method | Use the provider account page or the provider-defined support procedure. Confirm the exact line and account holder before submitting. |
| Source check | 2026-08-08 |
Checks before requesting or retrying MNP
- Check whether a reservation number is still being issued, already issued, expired, or waiting for reissue eligibility.
- Do not submit a normal cancellation before MNP completes; cancellation and number portability are different procedures.
- Data-only or special-purpose lines may not be MNP-eligible until converted to an eligible voice service, depending on the provider.
Recommended troubleshooting order
- Open the account page and confirm the exact line, contract type and account holder.
- Check whether another operation is pending: SIM/eSIM reissue, plan change, billing repair, identity verification or cancellation.
- Choose either MNP One-Stop or the reservation-number method based on the destination carrier's application flow.
- If using a reservation number, confirm issuance status, expiration date and whether a previous number is still active.
- Complete the destination-carrier application before performing a normal cancellation at the old provider.
When settings cannot fix the problem
If the line itself is not MNP-eligible, is a data-only/special contract, or requires a contract-type conversion, changing a phone setting will not solve the issue. Complete the provider-side procedure first.
Primary and official sources
- www.bmobile.ne.jp
- www.bmobile.ne.jp
- schema.org
- solqvia.com
- solqvia.com
- solqvia.com
- solqvia.com
- solqvia.com
- solqvia.com
- solqvia.com
- solqvia.com
Carrier procedures and product specifications can change. Re-check the current official page immediately before a SIM/eSIM migration, MNP request, purchase or imported-device use.