1. Find "Additional settings"
Press the phone icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-80d3084c-dcfb-4cbd-8407-d84e16fb6a6e.png?width=204&height=430)
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5616e65b-c055-45bf-bef7-5b53c1d10b6b.png?width=204&height=430)
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5fb312f0-cf00-4cf8-bc3d-7305bb7c62b5.png?width=204&height=430)
Press Calling accounts.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-823d32be-e9b2-4b24-b668-4aa35c2b9c63.png?width=204&height=430)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d2cf4d1b-ef5a-43d1-9745-7e09e38e4287.png?width=204&height=430)
Press Additional settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4979188d-5dd5-4fdf-b8f3-5986fa6432a0.png?width=204&height=430)
2. Turn call waiting on or off
Press the indicator next to "Call waiting" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-84b441ab-aaa0-42a3-a41e-f663c1a4a4d1.png?width=204&height=430)
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-84b441ab-aaa0-42a3-a41e-f663c1a4a4d1.png?width=204&height=430)