Why does my iPhone 4S randomly vibrate?

Like I'll just be sitting around and all of the sudden my iPhone will just vibrate once for no reason. I have no new notifications or texts or emails or anything like that. It just does it. Is there anyway of fixing it?

There might be a system error on your phone.give it a check in your nearest apple store and ask them. You might receive detailed information about the problem

Do you have push email with other folders besides your Inbox set to push?

I have my Gmail set to automatically apply a certain label to messages with a certain subject prefix. This "label" shows up as a folder on my iPhone, with Gmail set up as an exchange account. I have that folder set to push in addition to messages in my Inbox, so the phone will make the e-mail sound and vibrate when a message is received in that folder. However for some reason it doesn't show the badge on the Mail app. So if you heard the tone or felt the vibration, but then looked at the phone, it would appear that it vibrated for no reason, but it really did have a reason.

Its only and only because of your silent mode buuton in iphone, to check it simply go to setting then sounds then turn vibrate off in silent mode and then check it for one day… It will not vibrate…

you can buy a new button from ebay

http://www.ebay.com/...e+4+silent

  • Why won't my iPhone 4 vibrate when it's locked? Under settings, I already switched "Vibrate on Ring" on and "Vibrate on Silent" on. However, my phone doesn't vibrate when it is switched to silent and the phone is locked. It vibrates if I'm using the phone when I get a text, but not when it is locked. I have ringtones and vibrations set for calls and texts. But nothing happens when it is locked.
  • Why is my iPhone 4's Vibrate SUPER loud? So I have an iPhone 4 that I got from Craigslist. I've had it for awhile now, and the vibrate is SUPER loud. I purchased a new vibrate for it, but it's still loud. I have to have it on silent in school, otherwise everyone can hear it. It really annoys me. Is there anything I can do?
  • Why doesn't my iphone vibrate when I get facebook alerts? I have it set to all the correct settings, but it just doesn't vibrate or anything when i get notifications on facebook. It will just show that I have ya know 3 things or watever on the facebook icon. But I have it set to vibrate when I get something and it never does… And actually half the time it doesn't even show that i have a new fb message/comment… Ill just click the icon and go to fb then i realize i do have messages or comments. Wat the frig?
  • Why doesn't my iPhone vibrate? I have an iPhone 4S and I got it in July. For some reason, it doesn't vibrate! When I go to the settings to just set a vibrate tone it doesn't vibrate. It never vibrates, and I think it used to. Is there anything I can do?