1. Find "SIM cards"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-99a5aefd-723c-449c-bf49-40173841f468.png?width=206&height=412)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4db3e4f1-ec4f-4a95-8568-f783c96fe20a.png?width=206&height=412)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f788ea76-6c02-4f23-96c0-1dfd66a57020.png?width=206&height=412)
Press SIM cards.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1490f08b-a079-4501-a24d-ce0d58d49127.png?width=206&height=412)
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-a1808537-e155-4f0b-9447-1d0bc2162a33.png?width=206&height=412)
3. Select default SIM for mobile data
Press Mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a1808537-e155-4f0b-9447-1d0bc2162a33.png?width=206&height=412)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a61a8473-7e37-4845-ad35-557fb00ea7b4.png?width=206&height=412)
4. Select default SIM for voice calls
Press Calls.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a1808537-e155-4f0b-9447-1d0bc2162a33.png?width=206&height=412)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1927f32c-87dd-4520-8534-ba4e56d9f3b8.png?width=206&height=412)
5. Select default SIM for text messaging
Press SMS messages.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a1808537-e155-4f0b-9447-1d0bc2162a33.png?width=206&height=412)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f95d7551-cf65-407a-afd2-31f6bdff9aee.png?width=206&height=412)
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-a1808537-e155-4f0b-9447-1d0bc2162a33.png?width=206&height=412)