"Hey Siri" while in pocket or face down?

[camhabib]

One of my biggest frustrations with the "Hey Siri" function is that it doesn't work while the phone is face down or in my pocket. It would seem to me that when the phone is in either of these positions its likely to be least accessible and most commonly the time where one would want to use "Hey Siri" instead of picking up the phone and doing the task yourself or holding the side button. It's therefor a bit confusing that Apple chose to disable this function when the phone was in either of these positions. Anyone else share this frustration and possibly know of a way around this?