1. Find "Dual SIM settings"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f77a8e56-b2f6-4fb7-bd8a-668274854c25.png?width=204&height=446)
Press Wireless & networks.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cb0ac1eb-addc-42be-8381-27406e1c35e1.png?width=204&height=446)
Press Dual SIM settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8d2a0faa-8c38-4858-8495-d1626a101741.png?width=204&height=446)
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-551f5c34-1cf2-4c94-bb25-bfeec82cae03.png?width=204&height=446)
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-551f5c34-1cf2-4c94-bb25-bfeec82cae03.png?width=204&height=446)
Press SWITCH.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-59d5fd39-96be-4880-b076-94d015d6f954.png?width=204&height=446)
4. Select default SIM for voice calls
Press Default calling SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-551f5c34-1cf2-4c94-bb25-bfeec82cae03.png?width=204&height=446)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-46db650d-ac56-4783-872c-d87b41ecd18f.png?width=204&height=446)
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-551f5c34-1cf2-4c94-bb25-bfeec82cae03.png?width=204&height=446)