I have a scenario, User A Logs out of the mobile app, and user B log-in the app using the same device. Then what will happen on the back end New Device ID will be created and assigned to User B or User A device ID will be transferred to User B?

1 Answer 1


Multiple users on a single device is not a supported use-case, but to answer your question: DeviceID is static for the life of the installation.

  • Thank you so much Bill for the help here, It means Device ID will belong to the User B now and SDK will send an API to SFMC to remove the Device ID (Opt out or Delete) from USer A contact key and will assign it to the User B contact key?
    – Ex- SFMC
    Commented Oct 20, 2022 at 6:11
  • No. {random text so I can submit this comment}
    – Bill Mote
    Commented Oct 20, 2022 at 12:19
  • No same Device id will be assigned to newly logged-in customers.
    – Ex- SFMC
    Commented Oct 21, 2022 at 9:12

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