How to set the real q3s ringtone to get stronger gradually?

Enter the sound and vibration functions set by the mobile phone, and gradually turn on the ringtone.

The operating steps are as follows: Open the "Settings" of the mobile phone, find "Sound and Vibration" in the "Settings" interface, click "Enter", find the function of adding ringtones in the interface, and turn on the switch of this function.

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