Settings are attached as images. This does not require any supports.

Hollowed: 2mmHoles: Yes (Grid3d)Resin used for effects:

• Fast ABS-Like Fast Curing Non-Brittle 3D Printing Resin (Smoky Black, 1kg)
• Tenacious (1KG) a flexible and highly impact resistant resin by Siraya Tech
• Mix 150ml of Tenacious into a full 1L bottle of Fast/Smoky Black.

There are two pieces.

• The holder itself
• An extension, just incase your connector for your phone is larger.

I designed this cell phone holder and when I upgraded my phone and also added a phone case, I needed to modify my holder to work with larger cases and deeper plug in. I'm using a magnetic plug for charging in for my iPhone 11 Plus and it uses a 90 degree swiveled connector and connects with easy. I created the back with grooves large enough for the cord to fit through with easy, just in case you were want to connect from the side, based on what some mobile have.

Update: v7 I dropped the front lip from 15mm to 7.5mm.