Hello,
I’m experiencing a bug when trying to transfer my Battle.net Mobile Authenticator to a new phone, and after contacting support with no solution, I was advised to post this issue here on the official forums.
Problem summary:
I can log in to my Battle.net account on the new phone without any issues. However, when I try to attach / link the Mobile Authenticator to the new device, the process always fails with an “Unknown Error”.
Steps where the error occurs:
- Install the Battle.net mobile app on the new phone.
- Log in successfully (login works fine).
- Start the process to add / restore the Mobile Authenticator.
- Enter:
- Serial number
- Restore code
- Email address or phone number
- Press the confirmation button.
At this point, the process fails:
- If I use my email address, I get an “Unknown Error” message.
- If I use my phone number, I get a different popup, but the result is the same: the authenticator cannot be linked.
What I have already tried (as requested by support):
- Reinstalled the Battle.net app multiple times
- Cleared app cache and data
- Unlinked / removed the authenticator from the old phone
- Verified that the serial and restore codes are correct
- Tried both email and phone number
- Restarted the device and tested on a stable network
Despite all of this, the error persists every time.
Additional notes:
- The old authenticator was working correctly before changing phones.
- Login without the authenticator works fine on the new device.
- The issue only happens during the authenticator transfer/linking step.
This seems to be either a backend or app-related issue, as the same behavior happens consistently regardless of the input method.
Has anyone experienced this issue recently, or is Blizzard aware of a current problem with authenticator transfers on mobile?
Thanks in advance for any help or clarification.