1. Find "SIM card & mobile data"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ab5f158f-6e41-48ac-b3c9-a251a56b5287.png?width=200&height=444)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-90323103-becf-4282-9e24-e6f0df5d6c00.png?width=200&height=444)
Press SIM card & mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1031e6cc-b0df-4b54-a7b4-26326541ca8b.png?width=200&height=444)
2. Turn use of SIM on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bff161e5-cf9e-4c48-b381-c6ac099f7866.png?width=200&height=444)
Press the indicator next to "Enable" to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-52a2afa3-175d-4d81-81ff-65519806cef3.png?width=200&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-52a2afa3-175d-4d81-81ff-65519806cef3.png?width=200&height=444)
3. Select default SIM for voice calls
Press Calling.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bff161e5-cf9e-4c48-b381-c6ac099f7866.png?width=200&height=444)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-04e65f22-15d0-43cf-a727-9072ce078c74.png?width=200&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-04e65f22-15d0-43cf-a727-9072ce078c74.png?width=200&height=444)
4. Select default SIM for mobile data
Press Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bff161e5-cf9e-4c48-b381-c6ac099f7866.png?width=200&height=444)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c043c24e-9a29-44eb-b2b0-3c57ee442828.png?width=200&height=444)
If you change SIM, press Switch.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-70dc118e-ed6f-4521-bfd3-c191e3e3d266.png?width=200&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c043c24e-9a29-44eb-b2b0-3c57ee442828.png?width=200&height=444)
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-bff161e5-cf9e-4c48-b381-c6ac099f7866.png?width=200&height=444)