Zte Telstra Qwerty-Touch User Manual page 38

Place a Call on Hold
During a call tap Menu
The icon is displayed.
If you are already on a call and accept a new call, the first call
will be put on hold automatically. Tap Swap to switch between
the two calls.
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.

Add the required symbol directly from the keyboard.
> Hold to place the call on hold.