My IPhone 6 works great. Until you put headphones in or blue tooth in the car, and then if it turns even 1 degree, on goes voice control. I realize that it needs to be available for 911 if you are hurt, but... please, tell me or make a simple way to kill that feature.
iPhone 6s, iOS 9.3.2
It may be picking up on your voice and mistakenly registering what is heard as "Hey Siri".
Try disabling that feature through Settings>General>Siri (Allow "Hey Siri" Off) and test again to see if it continues. If it goes away, and you wish to continue the use of this feature, try having Siri learn your voice again. Use Siri on your iPhone, iPad, or iPod touch - Apple Support
I have had the same exact problem while working out.
I called Apple and they had me reactivate Siri. You will either have Siri or Voice Control enabled at any given time.
Siri, for me, was much more tolerant and has not ruined my workout thus far - Voice Control was an absolute nightmare to deal with!
Turn off voice control
