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OPPO Find X3 Pro
Android 11.0
1 Find "SIM card & mobile data"
Slide two fingers 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 data roaming on or off
Press the required SIM.
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Press the indicator next to "Data roaming" to turn the function on or off.
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If you turn on the function, press Turn On.
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3 Return to the home screen
Press the Home key to return to the home screen.
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