OMG, panic city if you do! I needed to to a hard reboot of my new X, and I held the volume button down while simultaneously holding the Power button...you know, the way you reboot an iPhone 7? Then all h*ll breaks loose...the screen flashes "Emergency SOS", and starts dialing 911! Yikes! I was frantic as I didn't need to have to explain to 911 dispatch why I called them, so I scrambled and got it cancelled before it made a connection...THEN it starts a countdown to dial my emergency contacts! Finally got that cancelled, and then looked up how to reboot an iPhone X. Seriously, why would you assign EMERGENCY functionality to an old keypress sequence?!? I mean sure, swipe up is now unlock, instead of Control Center...no big deal if I forget and swipe up. But taking a sequence that was a hard reboot and assigning to an EMERGENCY call procedure seems pretty dumb. Unfortunately it doesn't look like anything you can shut off either...so I wonder how many accidental 911 calls are going to be made in the next few months? Oddly enough, I haven't seen this mentioned in any of the tips and tricks for the X.