1. Find "Supplementary services"
Press the phone icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b046ae34-0c83-43a5-a7fe-d4a9539ce1cc.png?width=210&height=466)
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-09a6cba0-68fb-4dbf-952a-b8f19bf9cd1a.png?width=210&height=466)
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e14dd5a6-0ce0-4ae6-9a75-e8f7dce17e1d.png?width=210&height=466)
Press Supplementary services.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b52319fe-65fd-4abf-8501-8828291a0b51.png?width=210&height=466)
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-0c18e6a4-8314-4d96-aabf-d8fc5f33595e.png?width=210&height=466)
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-0c18e6a4-8314-4d96-aabf-d8fc5f33595e.png?width=210&height=466)