1. Find "SIM cards"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ee9bc0a1-843c-46fa-9a48-5d569c4d9ed6.png?width=198&height=440)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e2f8b409-302a-44ba-952d-7a8c6ee04c88.png?width=198&height=440)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-dac67cff-f632-4974-924c-9d0c1721cb88.png?width=198&height=440)
Press SIM cards.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-78ad1239-11f3-4994-b84f-06df0b7fe3d0.png?width=198&height=440)
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-297fd2be-a4e8-419d-8eca-2eb3b7243eea.png?width=198&height=440)
3. Select default SIM for mobile data
Press Mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-297fd2be-a4e8-419d-8eca-2eb3b7243eea.png?width=198&height=440)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0a280075-c527-4e54-a545-6087ee5173bf.png?width=198&height=440)
4. Select default SIM for voice calls
Press Allow calls.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-297fd2be-a4e8-419d-8eca-2eb3b7243eea.png?width=198&height=440)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d5826f90-af63-4f1a-ab60-cc6e88fc5a34.png?width=198&height=440)
5. Select default SIM for text messaging
Press SMS messages.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-297fd2be-a4e8-419d-8eca-2eb3b7243eea.png?width=198&height=440)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6034829e-5706-4885-86fb-02c17576718f.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-297fd2be-a4e8-419d-8eca-2eb3b7243eea.png?width=198&height=440)