1. Find "SIM card & mobile data"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-baf8c3ff-5606-4a2d-b191-bbcae3927f9b.png?width=198&height=444)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-88f9f90b-6a2b-4336-b863-cc7847bbe91a.png?width=198&height=444)
Press SIM card & mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b29cf363-c3cc-470a-8d04-5f7dbb6ee788.png?width=198&height=444)
2. Turn use of SIM on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8955e9c0-f0cb-4fc0-b653-5b7364544589.png?width=198&height=444)
Press the indicator below "SIM Info & Settings" to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8d0575fe-17fa-4000-8fa8-68b56b5fbd3f.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8d0575fe-17fa-4000-8fa8-68b56b5fbd3f.png?width=198&height=444)
3. Select default SIM for voice calls
Press Calling.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8955e9c0-f0cb-4fc0-b653-5b7364544589.png?width=198&height=444)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3b1fe36f-e480-4f2e-93d7-5a93c6d89cb8.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3b1fe36f-e480-4f2e-93d7-5a93c6d89cb8.png?width=198&height=444)
4. Select default SIM for mobile data
Press Mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8955e9c0-f0cb-4fc0-b653-5b7364544589.png?width=198&height=444)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3e994f77-3206-419f-ba78-fe12b91474c8.png?width=198&height=444)
If you change SIM, press Switch.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a031dccf-cd23-41fa-86d5-abf8d7dc8644.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3e994f77-3206-419f-ba78-fe12b91474c8.png?width=198&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-8955e9c0-f0cb-4fc0-b653-5b7364544589.png?width=198&height=444)