Nokia 5 holder

Bracket for Nokia 5 that clips on to a car air vent (relatively modern VW ones at least). Also, and mostly, an experiment in designed-in breakaway support material.
Support material has a 0.5 mm gap all around. Worked well for me with 0.3 mm layers. Should be easy enough to remove those blocks in slic3r or whatever if you don't want it there.