Yealink AX83H Default Password

Hi, I received a Yealink AX83H recently but I’m struggling with default password. user/user works but admin/admin does not. This was new out of the box and I also factory reset. I have tried Admin/Admin, admin/Admin. Admin/admin, admin/mac address, admin/serial number. I have successfully entered many Yealink phones and scoured the internet but not having much luck. Any other ideas?

Thanks

Flip it over and look at the label on the back with the MAC address. See if there are any default passwords. Vendors are moving more and more to unique default passwords on newer devices.

Or you can try this which was the first result in Google for your subject line.