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OPPO A57 4G
Android 12.0
1. Find "Incoming messages"
Press the message icon.
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Press the profile icon.
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Press Messages settings.
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Press General.
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Press Notifications.
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Press Incoming messages.
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2. Turn on message notifications
Press the indicator next to "Allow notifications" to turn on the function.
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3. Select message tone
Press Ringtone.
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Press the required message tones to hear them.
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Once you've found a message tone you like, press the Return key.
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4. Return to the home screen
Press the Home key to return to the home screen.
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