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OPPO A54 5G
Android 11.0
1. Find "SIM card & mobile data"
Slide your finger downwards starting from the top of the screen.
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Press the settings icon.
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Press SIM card & mobile data.
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2. Turn use of SIM on or off
Press the required SIM.
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Press the indicator below "SIM Info & Settings" to turn use of the SIM on or off.
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Press the Return key.
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3. Select default SIM for voice calls
Press Calling.
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Press the required setting.
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Press the Return key.
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4. Select default SIM for mobile data
Press Mobile data.
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Press the required SIM.
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If you change SIM, press Switch.
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Press the Return key.
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5. Return to the home screen
Press the Home key to return to the home screen.
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