I swaped my smartphone for a new one and used one of these magsafe cases.

But my magnetic holder for my car (BMW F30) didnt worked anymore

I used a this magsafe ring

and created a adapter then printed it with PET-CF from bambu and had to glue the magnet for the holder in because it comes lose because of cold air from the AC.

It should also work with ASA or ABS but dont try it with PETG or PLA because for the Heat in the car on hot sommer days