Select ringtones and vibrations on iPhone
You can set the default ringtone and assign distinctive ringtones to certain people. You can also turn the ringer off and use vibrations instead.
iPhone comes with ringtones that play for incoming calls, clock alarms, and the clock timer. You can also purchase ringtones from songs in the iTunes Store. See Manage your iTunes Store purchases and settings on iPhone.
Change the alert tones and vibrations
Go to Settings > Sounds & Haptics > Ringtone (models with system haptics) or Settings > Sounds > Ringtone (other models).
Do any of the following:
Turn vibrations on or off.
Set the default ringtone.
Set the alert for new voicemail.
Assign a different ringtone to a contact
Open the Contacts app .
Select a contact, tap Edit, then choose a ringtone.
Turn the ringer on or off
Flip the Ring/Silent switch to put iPhone in ring mode or silent mode .
Clock alarms still play when the Ring/Silent switch is set to silent.