About the "back number app"

Is the "back number app" a paid app?

The "back number app" itself can be installed for free.

If you are registered with the fan club "one room", you can use your existing Plus member ID and password.

* Access to member-exclusive content requires a paid "one room" membership.

Other questions about the "back number app"

• Q.
  What is the "back number app"?
• Q.
  I cannot log in to the "back number app".
• Q.
  Can I still use the "back number app" after changing my phone model?
• Q.
  When you log in using the "back number app," "[Not Registered]" will be displayed on your My Page.
• Q.
  If I delete the "back number app," will my fan club registration be canceled?
• Q.
  Is phone number verification required for the "back number app"?
• Q.
  I am unable to complete SMS authentication/identity verification for the "back number app".
• Q.
  The "back number app" won't open. (It force closes/returns to the home screen)
• Q.
  Could you please tell me about the push notification settings for the "back number app"?
• Q.
  Regarding inquiries about the "back number app"

back