This is the hybrid version where I printed 2 of them (stl) and used this 3d printed part and foam part to make the sun-shade/hood. It has built in rectangular tabs that will help in better adherence to bed. Please remove (easily breakable) the tabs after printing.

First cut the foam board in rectangular frame that holds the phone in to it.
Stick this rectangular frame to the 3D printed part with hot-glue gun.
Cut another larger rectangular foam (as per length of your phone) and stick it between two such 3d printed parts.

This actual sun-shade part is made from bending foam board. Press fit it in to the grooves on 3D printed part. Later, it could be easily disassembled and stored neatly without occupying much space.

Because of its type, it could be used on any size of phone. I am using it currently on Google Pixel 2XL without any problem.

Tronxy P802MA

Yes

0.2

30%

Break the tabs that are designed for adherence.

Tinker Cad