Procedures for Discontinuing the Use of a Smartphone Registered with an Android Smartphone electronic certification

When a smartphone for which a smartphone electronic certification has been registered is sold or sent for repair, is lost, or is stolen, the electronic certification must be revoked or temporarily suspended by the user.

Please refer to the for inquiries about the My Number System if you have any questions. In addition, to confirm whether your smartphone is compatible with the smartphone electronic certification, please refer to the smartphone compatible with the smartphone electronic certification.
In addition, for confirmation of whether you have registered a smartphone electronic certification, please see Mynaportal: for procedures when a lost smartphone is found.

Expiration of Smartphone electronic certification

Under the law, when you stop using a smartphone for which you have registered a smartphone electronic certification due to model change, trade-in, sale, disposal, or malfunction, you are required to cancel the electronic certification yourself.
By performing the revocation procedure from the smartphone on which the smartphone electronic certification is registered, the electronic certification will be revoked and the associated information in the smartphone will also be deleted.

If the electronic certification revocation procedure is not properly performed, the smartphone electronic certification will remain in the smartphone. (It will not be deleted by initializing the smartphone.)
Even if the electronic certification remains in the smartphone, it will not be abused unless the smartphone is properly managed or the password is known. However, in order to eliminate any possible risks due to the information remaining in the smartphone, when you stop using the smartphone for which the electronic certification has been registered, it is necessary to make sure that you complete the procedures for the expiration of the reservation.

How to Expire a Smartphone electronic certification

Please expire your registered smartphone electronic certification from the menu of the Mynaportal application. For instructions, see Mynaportal: Suspend the use of smartphone electronic certification (Expire) for procedures when a lost smartphone is found.

If you do not know the password required for the revocation procedure

The password (6 to 16 alphanumeric characters) set at the time of registration of the smartphone electronic certification is required for the revocation procedure. If you have forgotten your password, please initialize and reset it using the My Number Card and then follow the revocation procedure.
For how to initialize, see Mynaportal: to initialize the password, and for how to reset, see Mynaportal: for procedures when a lost smartphone is found.

If you are unable to initialize or reset the password, for example, if you do not have a My Number Card at hand, uninstall the electronic certification application while the smartphone on which the Mynaportal for smartphones is registered is connected to the network. The electronic certification will expire and related information in the smartphone will also be deleted.

If the terminal is initialized before the revocation procedure is performed

If you initialize a smartphone for which a smartphone electronic certification has been registered, please reinstall the Mynaportal application and open the Mynaportal application menu while the smartphone is connected to the network. The smartphone electronic certification will be deleted (*) and cannot be used.

*By installing the Mynaportal application again, the remaining old electronic certification will be deleted.

If the Terminal is sold without any failure or loss of validity procedures

In order to prevent unauthorized use of the electronic certification, please temporarily suspend the use of the electronic certification for smartphones.

Temporary Suspension of electronic certification for Smartphones

When a smartphone with a registered smartphone electronic certification is lost or stolen, temporary suspension of use is required to prevent unauthorized use of the electronic certification.

How to Suspend Smartphone electronic certification Usage

My Number general toll-free number from a representative such as a family member living in Japan and temporarily suspend the use of the electronic certification.
In order to resume use when a smartphone is found after temporary suspension due to loss or theft, please visit Mynaportal: for procedures when a lost smartphone is found.

Lost or stolen overseas

With the My Number general toll-free number, basically we cannot connect calls from overseas.
In the event that a smartphone for which a smartphone electronic certification has been registered overseas is lost or stolen, please contact the My Number general toll-free number from a representative such as a family member living in Japan and temporarily suspend the use of the electronic certification.