How do I put the phone to vibrate only?

[AC Question]

Phone does not ring when someone phones it.

 

[belodion]

Take a look in Settings, Sound, Volumes, as here:

 

[adyy]

At settings/ sounds and notifications should be a checkbox, called "Vibrate when ringing", check it and then minimize the ringtones volume.

 

[ManiacJoe]

"volumes" is the wrong screen.
Up one level or so in the settings menus, there should be something called "sound profile" or something like that.
From there you can pick: sound, sound and vibrate, vibrate, silent.... Depending on the options available.

That is for the phone in general. Many apps have their own notification settings that override the phone settings.

 

[belodion]

^ Yes you're right. My recommendation would extinguish the notification sounds as well.

On the Moto E I'm using, I'd go into Phone settings, leave Vibrate on, and select None for Ringtone.

...All of which could also be done via Settings, Sound.