1. Find "SIM cards"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-80d3084c-dcfb-4cbd-8407-d84e16fb6a6e.png?width=204&height=430)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4db2b8ce-df66-4c50-8715-ec0fb3f9df74.png?width=204&height=430)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-86d9a3da-d1b3-4717-a082-bc4b542596e8.png?width=204&height=430)
Press SIM cards.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b1266bf9-cce8-4bc5-acc9-6d73c34e61d9.png?width=204&height=430)
2. Turn use of SIM on or off
Press the indicator next to the required SIM to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a67c001-47d7-42e7-b5c3-4e3274864a54.png?width=204&height=430)
3. Select default SIM for mobile data
Press Mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a67c001-47d7-42e7-b5c3-4e3274864a54.png?width=204&height=430)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e9dfe82d-23f2-4de8-8389-107aa6ecb470.png?width=204&height=430)
4. Select default SIM for voice calls
Press Calls.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a67c001-47d7-42e7-b5c3-4e3274864a54.png?width=204&height=430)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f0bd5e86-a3e7-48a0-bdcc-d7f304058d70.png?width=204&height=430)
5. Select default SIM for text messaging
Press SMS messages.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a67c001-47d7-42e7-b5c3-4e3274864a54.png?width=204&height=430)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-29317fb3-9809-422b-9df6-d06d97e2d96c.png?width=204&height=430)
6. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a67c001-47d7-42e7-b5c3-4e3274864a54.png?width=204&height=430)