Smart phone pocket clamp

You ever had your smart phone in your shirt pocket and you bent down to pick something from the floor? Then you surely encountered that your phone tends to fall down. Since I damaged my old smart phone that way, I decided to build a solution to protect my new phone. The result is my "shirt pocket smart phone clamp". Since I use it, my smart phone remains in its place, even if I bend down to grab something from the floor.

How it works:
The clamp body holds the phone by squeezing it in betwee