1. Find "Supplementary services"
Press the phone icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-72f996c0-1c9e-4fe8-b385-c67e0a931f1b.png?width=206&height=450)
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6db07c57-25bc-4a11-a2d9-fa1d703d2809.png?width=206&height=450)
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-efd0658c-73f9-4825-afad-601d9d19f59d.png?width=206&height=450)
Press Supplementary services.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b29c58cf-7d81-4391-ac39-2aba6c6673d2.png?width=206&height=450)
2. Turn call waiting on or off
Press the indicator next to "Call waiting" below the required SIM to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e9944b9b-925b-4aa4-8388-8619d065a8eb.png?width=206&height=450)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e9944b9b-925b-4aa4-8388-8619d065a8eb.png?width=206&height=450)