I keep my iPhone on silent pretty much all the time. When I plug it in to a charger, it goes "buzz-buzz". My iPad doesn't do this. Both behaviors are the same with iOS 6 and 7.
How do I make my phone not do that?
I have checked the activity-specific sound settings (like Lock Sounds [off], etc). The main suspicious ones are Vibrate on ring and vibrate on silent. I would still like to have it buzz (vibrate) upon receiving texts, calls, and calendar alerts.
Best Answer
There is no way to natively disable this other than turning off vibrations completely. Only your iPhone does this because the iPad (and the iPod touch) don't have vibrate motors.
If you jailbreak, there is a tweak called PowerSoundDisabler. It's a simple tweak to disable sound and vibration when respringing or plugging in via USB.