Easy to print adjustable foldable mobile stand, no supports

This mobile stand has been inspired by the creation https://www.thingiverse.com/thing:3617760 - a really good one: laconic and easy to print.

The upgrades:

• made it flat when folded, so the hooks don't stick out
• added the bar that connects the hooks so the phone doesn't slip down
• made hooks wider for better phone holding
• made print's parts thicker for better durability
• added the spring to cradle part to secure pins in their holes
• only 13mm high, when folded

The other changes:

• only 3 positions instead of 4 in original creation
• the print uses about 8-9m of filament (accordingly to PrusaSlicer) instead of 6m used by original (because of thicker parts)

This mobile stand fits iPhone 13-14. Of course it also fits smaller phones or slightly bigger phones.