Kyocera QCP 6035 Reference Manual page 179

Disabling call waiting
When using a landline phone, call waiting can cause a network session to end if you
receive another call while you are connected. You should not need to disable call
waiting when making a wireless data call, because call waiting is handled
differently by wireless phone service providers. If for whatever reason you need to
disable this feature on your Kyocera smartphone:
1. Tap the Disable call waiting check box.
2. Tap the Disable call waiting line. Enter the disable code. Each telephone
company assigns a code to disable Call Waiting. Contact your local telephone
company for the code you should use.
Using a calling card (optional)
You can use a calling card for your calls to an ISP or dial-in server. After dialing the
ISP, the phone enters your calling card number automatically.
However, when you connect to a server, there is usually a delay before you enter
your card number. To produce this delay, you must add commas before the card
number. Each comma delays the transmission of the number for two seconds. You'll
need to experiment to determine the correct delay.
1. Tap the Use calling card check box.
2. Tap the Use calling card line. Enter your calling card number.
3. Tap OK to confirm your selection.
Tap this box to turn off Call Waiting.
Enter the disable code here.