1. Find "SIM management"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-985dac77-368a-492b-9682-7a60edcd8e6b.png?width=208&height=450)
Press Mobile network.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cf96b932-3731-4e02-b582-303eb673f874.png?width=208&height=450)
Press SIM management.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-adb0b82d-df48-41fb-ba24-345acf6bd087.png?width=208&height=450)
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-b4374c3a-ed51-420c-9d32-e17c4db4fefb.png?width=208&height=450)
3. Select default SIM for mobile data
Press the field next to “Default mobile data“ below the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b4374c3a-ed51-420c-9d32-e17c4db4fefb.png?width=208&height=450)
4. Select default SIM for voice calls
Press Default calling SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b4374c3a-ed51-420c-9d32-e17c4db4fefb.png?width=208&height=450)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5135f864-148b-404b-aa2e-759de76f5a73.png?width=208&height=450)
5. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b4374c3a-ed51-420c-9d32-e17c4db4fefb.png?width=208&height=450)