1. Press Call1 button + 828 .
2. Dial the Time and Date password. The password is normally 0000.
3. Dial two digits for the year (e.g., 92).
4. Dial two digits for the month (01-12).
5. Dial two digits for the day (01-31).
6. Dial the day of the week (0-6). 0=Sunday, 6=Saturday
7. Dial two digits for the hour (24 hour). For example, 13=1:00 PM.
8. Dial two digits for the minutes (00-60).
You hear confirmation beeps.
9. Press Speaker Button to hang up.