Zte Optus My Tab User Manual page 41

Call
Barring
Settings
Speed dial
Insert a Pause or Wait symbol into a phone number
Insert a Pause symbol ',' to add a 2 second delay.
Insert a Wait symbol ';' to wait until the next key press.

Enter the phone number on the Dial pad.

Tap and hold the Menu key to bring up the QWERTY keyboard.

Add the required symbol directly from the keyboard.

Press Back to return to the dial pad.
Additional
settings
Bar various call types. This requires support from your
network provider and the barring code.
Set Speed Dial keys. Key 1 is used for Voicemail so
cannot be set. To use Speed Dial, press and hold the
related number on the dial pad. Eg. Hold the '1' Key to
call your Voicemail service.
Call Hear pips to indicate an
waiting incoming call while on a call.
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