User's Manual

WS2000/WS4000 Operating Manual
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When the phone is relying on the internal battery for power and the battery
strength is weak, a low battery warning tone will sound through the speaker.
2.4.9 SMS/VMS Notification Tone
A SMS/VMS notification tone will sound through the speaker when the
phone has received a SMS or VMS message.
2.4.10 Error Beep Tone
An Error Beep Tone will sound when the keypad is pressed incorrectly. In
this case, the incorrect operation is ignored.
3. Basic Function