1. Find "Mobile network"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-829520a6-85af-4af4-8a29-1ba00b3d2297.png?width=198&height=440)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f09a36f1-e2bc-43d4-b6a0-60fd60361bce.png?width=198&height=440)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1b806410-be77-4525-88e0-6759899a892f.png?width=198&height=440)
Press Mobile network.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-66238d1e-f50e-4ee6-93b2-cc43c5336c48.png?width=198&height=440)
2. Turn use of SIM on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a70aaf6-d8b3-4db3-bc32-c32e29d5bec2.png?width=198&height=440)
Press the upper indicator to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4a687e95-3a2d-4168-b5f3-10f093aab7a2.png?width=198&height=440)
3. Select default SIM for mobile data
Press Data preferences.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4a687e95-3a2d-4168-b5f3-10f093aab7a2.png?width=198&height=440)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8987a327-98db-4b5b-964e-f6b710ef4e39.png?width=198&height=440)
4. Select default SIM for voice calls
Press Calls preference.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4a687e95-3a2d-4168-b5f3-10f093aab7a2.png?width=198&height=440)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-188a820f-0d21-4ae6-abb0-df5f9f784606.png?width=198&height=440)
5. Select default SIM for text messaging
Press SMS preference.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4a687e95-3a2d-4168-b5f3-10f093aab7a2.png?width=198&height=440)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9a18a01e-6de1-4933-8f33-82490e4b62d6.png?width=198&height=440)
6. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4a687e95-3a2d-4168-b5f3-10f093aab7a2.png?width=198&height=440)