Xiaomi Redmi Note 9
Android 10.0
Select help topic
1. Find "SIM cards & mobile networks"
Press Settings.
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Press SIM cards & mobile networks.
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2. Turn use of SIM on or off
Press the required SIM.
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Press the indicator next to "Turn on" to turn use of the SIM on or off.
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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.
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Press the Return key.
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3. Select default SIM for voice calls
Press the required setting below "Default for calls".
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4. Select default SIM for mobile data
Press the required SIM below "Data card".
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5. Return to the home screen
Press the Home key to return to the home screen.
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