The reason I did a Phone Holder is because I want to have something to hold my phone in the car. I also add a spot were you could charge your phone through the Phone Holder and I also add spot were the music would come out. I put 3 or 4 circles in the case for my headphones to put inside the phone holder at the same time if I would like. I also add fillets to the edges to make it look like it was a rounded object to hold my phone in. I add a part were you could put it into the air-vent where the air comes out so you could put it there so it could hold it.