It’s so important to have your camera application working at all times. Can you clarify what you mean exactly by “turning on by itself?” We want to make sure we have all of the details.
Follow us on TWITTER @VZWSupport
If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!
On my Droid Turbo 2, Settings->Display there is an option for 'Press power button twice for camera'. Possibly some setting like this is ON and hitting a particular button is a shortcut for activating the camera .