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English technical companion · checked 2026-08-08

MVNO MNP: One Stop Login Name Mismatch Troubleshooting

English guide to MVNO MNP: One Stop Login Name Mismatch Troubleshooting, including MNP One-Stop, reservation-number timing, conflicting procedures and the safest order to retry.

Updated: 2026-08-08Evidence: SolQvia structured records + primary-source links from the Japanese companion
On this page
  1. Summary / device record
  2. Diagnostic order
  3. Official sources

MVNO: MNP procedure summary

ProviderMVNO
MNP One-StopNot verified
Reservation-number timingNot verified
Primary methodUse the provider account page or the provider-defined support procedure. Confirm the exact line and account holder before submitting.
Source check2026-08-08

Checks before requesting or retrying MNP

  • Do not run MNP One-Stop and the reservation-number method at the same time. Choose the method used by the destination application.
  • Check whether a reservation number is still being issued, already issued, expired, or waiting for reissue eligibility.
  • Verify account-holder name and identity-verification status before retrying.

Recommended troubleshooting order

  1. Open the account page and confirm the exact line, contract type and account holder.
  2. Check whether another operation is pending: SIM/eSIM reissue, plan change, billing repair, identity verification or cancellation.
  3. Choose either MNP One-Stop or the reservation-number method based on the destination carrier's application flow.
  4. If using a reservation number, confirm issuance status, expiration date and whether a previous number is still active.
  5. 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.

Related English guides

Primary and official sources

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.