- Open Menu,
- Confirm "Alarm Clock" option with "OK
- Then, the word "Activation" comes up and there's a check mark next to it
- Confirm with the "OK" button until the check mark is gone and you have deactivated it.
To make the things easier, press the Menu (OK) button 3 times and you have deactivated the Alarm Clock.
It is important to return to the Home screen (with the red End Call key) in order to avoid placing the check mark again.