Sharp WX-T81 hard reset

Sharp WX T81 Master Reset
You can reset some of the settings or all the settings
from M1 to M12.
Resetting Some of the Settings

“Settings” → “Master Reset” → “Reset Settings”
1. Enter your handset code.
The default handset code is “9999”.

Resetting All Settings from M1 to M12
“Settings” → “Master Reset” → “Reset All”
1. Enter your handset code.
The default handset code is “9999”.