Preventing your device from vibrating whenever it gains or loses its mobile network connection I've been using a Moto G (2nd generation) running Android 6.0 "Marshmallow".  I was playing with the settings, and changed some setting.  Now, every time the phone loses or regains cellular service — for example, when I'm in the basement, or when I enable or disable airplane mode — the phone vibrates two or three times.  The vibration is noisy and annoying.  What can I do to prevent it from happening?
I found a relevant CrackBerry.com forum post by Kathy Mansfield.  The post guided me towards a solution that works.

Open the Phone app.
Press the three-dots icon in the top-right-hand corner of the app.
Tap &quot;Settings&quot;.
Tap &quot;Calls&quot;.
Tap &quot;Voicemail&quot;.
Uncheck the &quot;Vibrate&quot; option.

The forum poster explains:

If you have a pending notification, like a voicemail message you've not retrieved, you'll see the icon for the message. Every time your service is lost and regained, it will vibrate because of the voicemail notification. I suppose it thinks the notification is new. ...
Alternatively, you could just clear the ... voicemail message and hence the notification.