Factory reset your Yealink T46S
- Hold the "OK" button down for 10 seconds or until prompted to initiate factory reset
- Confirm the reset via the softkeys.
- Allow unit to reboot then enter the last 5 digits of the serial number located on the back of the phone.
- Allow the unit to reboot and factory reset
Once Completed the unit will be reset and will attempt to obtain its new configuration (as long as it is connected to a working connection).