Chest mounted phone holder, it may not fit your phone. Measure and maybe remix before you print. Print one of each, 2 of the hooks, and assemble glued as in the third picture.
Extra materials you will need are for the harness. I used 40mm wide nylon webbing, matching strap buckles and clips (you could 3d print those)
And also a couple of elastic bands.
Be aware that it is sized for my phone (Samsung A22 including phone case) so it may not fit yours.
Use organic supports for the PhoneHolder_A for the pins.
The author marked this model as their own original creation.