Huawei P smart 2019
Android 9.0
Select help topic
1. Find "Dual SIM settings"
Press Settings.
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Press Wireless & networks.
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Press Dual SIM settings.
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2. Turn use of SIM on or off
Press the indicator next to the required SIM to turn use of the SIM on or off.
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3. Select default SIM for mobile data
Press the field next to “Default mobile data“ below the required SIM.
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Press SWITCH.
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4. Select default SIM for voice calls
Press Default calling SIM.
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Press the required setting.
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5. Return to the home screen
Press the Home key to return to the home screen.
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