Posted January 27, 2025 at 11:59 GMT
Sorry but that's the only battery reset procedure that I know - I think it may work for both Mk1 and Mk2 models.
You could also try resetting the handset - make a note of any stored numbers first. You may also want to be sure that your PSTN base does not have a pincode set.
If it's a Mk1 (dot button to the left of the circular wheel), press (dot) then 70009
If it's a Mk2 (INT button to the left of the circular wheel), enter the service menu by pressing: 9#9#9✱INT then scroll to 'reset handset' and press centre button.
You will have to re-register with the PSTN base after a handset reset, which may need a pincode as mentioned above. Default is 0000.
Location: Warwickshire, UK