Excuse me, how to set the gradient ringtone for iPhone? I think the bell suddenly rang too loudly. Is there a gradient function? The function of changing bass to treble.

The ringtone fade-in function is not set directly for iphone. The ringtone fade-in function can be realized by adding a custom fade-in ringtone. The specific setting process is as follows:

1. Take the iphone6 as an example. In the standby interface of Apple's mobile phone, find the "Settings" option and click Open.

2. In the setting interface, find the "General" option and click Open.

3. In the general options, find the "ringtone and touch" option, and click to open the "phone ringtone" function.

4. Finally, select the downloaded crescendo ring to complete the setting of crescendo ring.