![OPPO A54s](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-e121f6ca-95cb-4a09-8098-d39b47c67aaa.png?width=150&height=320)
OPPO A54s
Android 11.0
1. Find "SIM card & mobile data"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-33e0cf96-7d66-44d4-af4c-04f45e362355.png?width=198&height=444)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-121d34d3-3c68-444b-bc6e-83b7e1c08d72.png?width=198&height=444)
Press SIM card & mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-57e4edde-e1b3-4e0b-bd1d-fadf9f13bea4.png?width=198&height=444)
2. Turn use of SIM on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-0d456f09-5b7d-406a-910c-3bfb3dee41bb.png?width=198&height=444)
Press the indicator next to "Enable" to turn use of the SIM on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c99d7647-6be4-4f41-9da4-d83aec74896b.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c99d7647-6be4-4f41-9da4-d83aec74896b.png?width=198&height=444)
3. Select default SIM for voice calls
Press Calling.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-0d456f09-5b7d-406a-910c-3bfb3dee41bb.png?width=198&height=444)
Press the required setting.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-4a872767-43fe-4b8a-80e9-3b5eb2c600f7.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-4a872767-43fe-4b8a-80e9-3b5eb2c600f7.png?width=198&height=444)
4. Select default SIM for mobile data
Press Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-0d456f09-5b7d-406a-910c-3bfb3dee41bb.png?width=198&height=444)
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c803a283-13ca-4262-8740-04b023942c29.png?width=198&height=444)
If you change SIM, press Switch.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-f0582ebc-3bf9-4cdd-924b-84b7f1e577e6.png?width=198&height=444)
Press the Return key.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c803a283-13ca-4262-8740-04b023942c29.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/7151223-f-0d456f09-5b7d-406a-910c-3bfb3dee41bb.png?width=198&height=444)