You can disable a mobile device by visiting https://account.autharmor.com/devices and selecting the device you wish to disable. Click the "Disable This Device" button. A popup will show asking for confirmation that you really want to disable this device. After confirmation that you want to disable this device, a push auth request is sent to your devices to get biometric or security get authentication for disabling this device. You can not reply with the device you want to disable.