Use industrial strength 3M adhesives to easily attach your phone to any Helmet, flat or curved surfaces.
I use the curved mount on my helmet while live streaming a How-to about tying flies (for flyfishing). This format allows me to see exactly what I'm doing and still lets me see the screen of the phone. It's surprisingly good, sturdy, and easy to use. Viewers can see exactly what I'm doing close up and the phone stays out of my way while I'm tying. I'd recommend this to anyone that needs a hands free solution.