OPPO Find X3 Pro
Android 11.0
Select dual SIM settings
When you insert two SIMs into your phone, you can make calls and send and receive messages from both SIMs. You can also select a default SIM for mobile data usage.
1. 1. Find "SIM card & mobile data"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press SIM card & mobile data.
2. 2. Turn use of SIM on or off
Press the required SIM.
Press the indicator next to "Enable" to turn use of the SIM on or off.
Press the Return key.
3. 3. Select default SIM for voice calls
Press Calling.
Press the required setting.
Press the Return key.
4. 4. Select default SIM for mobile data
Press Mobile data.
Press the required SIM.
If you change SIM, press Switch.
Press the Return key.
5. 5. Return to the home screen
Press the Home key to return to the home screen.