How do I deregister my Beyond Bank Mobile Banking app?
To deregister the Beyond Bank Mobile Banking App on your phone, tap App Settings in the menu and then select My Devices.
Tap the device that you would like to deregister, then tap De-register device at the bottom of the screen. You can also de-register your device by tapping Forgot App PIN under App Settings.
https://www.beyondbank.com.au/need-help/how-do-i-deregister-my-beyond-bank-mobile-banking-app