1. Find "Additional settings"
Press the phone icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-99a5aefd-723c-449c-bf49-40173841f468.png?width=206&height=412)
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6c1bdcd1-feff-4843-95e4-ece531cc6d4d.png?width=206&height=412)
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4f1e5948-e9a8-4413-88c6-961c68e5fb92.png?width=206&height=412)
Press Calling accounts.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-74800018-254e-417d-be59-f3ea530263d7.png?width=206&height=412)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cdf0ee27-d119-469b-b71d-67c08105a446.png?width=206&height=412)
Press Additional settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-10c34ff8-4c06-4075-9b88-50076d3c0798.png?width=206&height=412)
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-6edf158d-8280-4be6-b6c9-56a8565879ca.png?width=206&height=412)
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-6edf158d-8280-4be6-b6c9-56a8565879ca.png?width=206&height=412)