How to reset Yealink T46G to factory settings

In order to reset your Yealink T46G to factory settings:

1. Turn on the phone and wait until it has booted up
2. Press the OK button until the phone asks you if you want to reset to factory settings
3. Confirm the factory reset by pressing OK (i.e. the button on the bottom right of the screen, i.e. the rightmost button of the row of buttons just below the screen)
4. Wait for the phone to reset