I use one that fits in the CD slot. I don't listen to CD's, but if I did, this does not impede the operation of the CD player. I like to be able to see the screen for GPS purposes.
http://www.amazon.com/Mpow-Universal-Holder-Rotation-Samsung/dp/B00PC29ETE/ref=sr_1_4?ie=UTF8&qid=1439475645&sr=8-4&keywords=cd+slot+phone+holder