Device Guides
Samsung Galaxy S21 5G
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How to
Choose dual SIM settings
When you insert two SIMs into your mobile phone, you can make calls and send and receive messages from both SIMs. You can also select a default SIM for mobile data usage.
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap Connections.
Tap SIM card manager.
Tap the required SIM.
Tap the indicator to turn use of the SIM on or off.
Tap the Return key.
Tap Calls.
Tap the required setting.
Tap Messages.
Tap the required SIM.
Tap Mobile data.
Tap the required setting.
Tap the Home key to return to the home screen.
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