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Regarding this, how can you make your phone vibrate?

Open your device's Settings app. Choose what happens:Vibrate: Phone calls and notificationsvibrate.

To make your phone vibrate for all calls whether the ring volumeis on or not:

1. Press a volume button.
2. At the right, tap Settings .
3. Turn on Also vibrate for calls.

why does my iPhone keep vibrating when I plug it in? If you hear an iPhone vibrate when it's charging,you may have an accessory problem. Faults in adapters or cables maymake the iPhone vibrate constantly or at regular intervalswhenever you plug it in. Water damage and notificationsettings can also be potential reasons you notice your phonebuzzing when charging.

Also asked, why does my iPhone keep vibrating for no reason?

It's possible you have an app set up for Soundnotifications but have the Badge, Alert Style, and NotificationCenter settings switched off. To check the notification settingsfor your apps, go to Settings > Notification Center. Youshould see a list of all of the apps on your device thatsupport Notifications.

How do I unmute my phone?

Pull the phone away from you and look at thedisplay screen. You should see "Mute" located either on the right-or left-bottom corner of the screen. Press the key directly underthe word "Mute," regardless of what the key is actually labeled.The word "Mute" will change to "Unmute."