Solved: How to reset Sharp 703 hard reset: “Settings” → “Master Reset” →

Master Reset

Resetting Settings from M1 to M12
“Settings” → “Master Reset” → “Reset Settings”
1. Enter your handset code.
The default handset code is “9999”. For details on changing the
handset code, see “Changing the Handset Code”.
Note
• All settings are not reset.
Resetting All Settings from M1 to M12 and All Created Data
“Settings” → “Master Reset” → “Reset All”