I always pair my phone's BT to play music of my spotify playlist. I chuck my phone into one of the cup holders to keep it stable. If I left my phone in my coat pocket or trouser pocket the interference would be quite bad.
I wanted a smarter way of docking my phone and decided a phone holder was needed. There are plenty to choose from on the market both with used suction on plastic or window. I wanted an OEM mount but also somewhere I can put my phone easily if I had to navigate something while driving.
I've previously used Brodit holders and found the quality very good. They did two variations on the 8V.
This is the one I went for, and just to note it requires two parts so they mostly universal for what you need to mount as your next device. It doesn't require any dash drilling just holds very firmly into place between the plastics.
Here are my night pics when its paired up to spotify.
Just a note, if you use spoify and want album cover to show (if your phone is not fully compatible or dont have the right accessories) you can use an Android App called Keepscreen which keeps the screen on as long as you like. I know this has an effect on battery but looks cool as hell.