1. Find "Ringtone"
Slide two fingers downwards starting from the top of the screen.
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Press the settings icon.
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Press Sounds and vibration.
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Press Ringtone.
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2. Select ring tone
Press the add ring tone icon.
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Press the required ring tones to hear them.
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Once you've found a ring tone you like, press Done.
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3. Return to the home screen
Press the Home key to return to the home screen.
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