1. Find "Additional settings"
Press the phone icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ab5f158f-6e41-48ac-b3c9-a251a56b5287.png?width=200&height=444)
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-604867bb-ce67-4d84-80ba-365cdeac1d9e.png?width=200&height=444)
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-649fc10e-15c8-4a30-914a-1c4191f6e423.png?width=200&height=444)
Press Calling accounts.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f6534015-cf63-49ff-8660-37facf56788d.png?width=200&height=444)
Press Carrier call settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b461471b-1152-4271-9d04-0b6a18374adb.png?width=200&height=444)
Press Additional settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bb83881b-18c4-4b7d-b0e7-b4a1ed56aed4.png?width=200&height=444)
2. Turn call waiting on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1ee90d54-d71c-4f12-871c-a796ce5e8f81.png?width=200&height=444)
Press the indicator next to "Call Waiting" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-475f57ec-e745-4421-9db9-1659037e92e0.png?width=200&height=444)
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-475f57ec-e745-4421-9db9-1659037e92e0.png?width=200&height=444)