1. Find "SIM cards & mobile networks"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2591fca6-db59-4b91-9cd2-79749458ce00.png?width=202&height=448)
Press SIM cards & mobile networks.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-89607216-1560-4dc4-9e85-d790c6102fb6.png?width=202&height=448)
2. Turn use of SIM on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-69bbdf8f-9cb4-4a82-890f-3b6106031533.png?width=202&height=448)
Press the indicator next to "Turn on" to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bcb0cc63-9613-46fb-8bfe-94d7bb57bf58.png?width=202&height=448)
If you turn off use of the SIM, press OK.
You can only turn off use the SIM if it has not been selected as the default SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-10270e66-b966-47c2-baa8-b8fe80650c0c.png?width=202&height=448)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bcb0cc63-9613-46fb-8bfe-94d7bb57bf58.png?width=202&height=448)
3. Select default SIM for voice calls
Press the required setting below "Dial".
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-69bbdf8f-9cb4-4a82-890f-3b6106031533.png?width=202&height=448)
4. Select default SIM for mobile data
Press the required SIM below "Internet".
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d344c93f-8095-4a01-9283-8d6c1944ce07.png?width=202&height=448)
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-69bbdf8f-9cb4-4a82-890f-3b6106031533.png?width=202&height=448)