Here's my solution to walking/hiking with a MM if you don't like backpacks. I 3D printed a iphone 7 holder (suggested by 2Alan_M here ) with a slight mod to accept my thicker Otterbox Defender case by heating and bending open the clips. Then I added a camera strap and put a elastic velcro band behind/around the holder and strapped in the Mini. The straps can hold the props if you want, I find it isn't needed. The camera and gimbal is protected and the MM is held snugly against the phone, arms folded or open.
For super quick launches, leave everything powered up and the MM arms out and after releasing the strap just manually start the motors (left and right sticks down and in) and lightly toss the MM start hovering in 5 seconds... at your own risk.... To minimize battery drain, I suggest to take the extra 30 seconds and have your phone on but to turn on the FC and Mini and wait to get GPS etc. before launching. I always have a spare battery or two in my pocket. No need to carry a launch pad as a hand launch/land is still my preferred way.
Here's a bunch of photos showing the mount and various views. I now see the cable to the phone was disconnected in a few photos.
For super quick launches, leave everything powered up and the MM arms out and after releasing the strap just manually start the motors (left and right sticks down and in) and lightly toss the MM start hovering in 5 seconds... at your own risk.... To minimize battery drain, I suggest to take the extra 30 seconds and have your phone on but to turn on the FC and Mini and wait to get GPS etc. before launching. I always have a spare battery or two in my pocket. No need to carry a launch pad as a hand launch/land is still my preferred way.
Here's a bunch of photos showing the mount and various views. I now see the cable to the phone was disconnected in a few photos.