Reddit mentions of Nekteck Car Mount, CD Slot Magnetic Cradle-Less Car Phone Mount Holder with Swivel for iPhone X/8/7 6S/ 6 6 Plus, SE, Galaxy S9/S8 S6/S7 Note 9 8 5, LG G7 G6, Pixel 3/2 XL Nexus 6P 5X More

This one:
https://www.amazon.com/dp/B0175W45I8/ref=cm_sw_r_cp_apa_xYjCxbMZQY6PW
The mount side goes into your CD player slot. A thin steel piece goes between your case and your phone. It just snaps on and off magnetically. Works super well. Have a Nexus 6p in my Crosstrek and as long as you tilt it up a bit, you can see both displays fully. I put Google maps on the phone and Pandora on the car screen. Love it.

This is much much much more stable than the glass suction mounts and ac vent mounts. It's the best thing to ever happen to phone mounts. You lose the ability to play cds but which self respecting smartphone owner would do that anyway?

https://www.amazon.com/Nekteck-Magnetic-Cradle-less-Holder-Samsung/dp/B0175W45I8/

I bought this for my phone a while ago and it's been working wonderfully!
https://www.amazon.com/gp/aw/d/B0175W45I8/ref=yo_ii_img?ie=UTF8&psc=1
I actually just keep the metal plate under the back plate on top of the battery. This prevents it from interfering with NFC (I don't have wireless charging, but I would assume it wouldn't interfere with that either because the plate is on the other side of the sticker.) The only issue is if I need to pull the battery, I have an extra thing to keep track of as I pull the back plate off, but that's not really that big of an issue for me.

I use a cd slot mount with a magnetic attachment to it. It's nice because i can actually see my speedo info. They regularly go sale so you can look around some more but this is just so you can get the right idea. I'll take a pic of it in my car if you want.

https://www.amazon.com/dp/B0175W45I8/ref=cm_sw_r_other_apa_sZdyxbKPG02NC

I had the Mountek one for 3 years and loved it... CD tray usage was nice. it finally broke the other day and i picked up another type that was magnetic.

http://www.amazon.com/gp/product/B0175W45I8?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00

it c omes with 2 plates, a super thin one to go between your phone and inside of your case (im using that method right now) and another plate that has 3M tape on the back to place on your phone directly if you go naked.

its pretty dang awesome and very strong.

I just got one of the thin metal plates and put it in my case without using the adhesive. Works great with the case skin from the store.
http://www.amazon.com/gp/product/B0175W45I8
http://www.amazon.com/gp/product/B00YAKRD2E

Both of these have worked well for me, my suspension in my car might also be a little softer if you are having issues though. The ball one I used when it was on my dash so the phone didn't rotate but mostly rested, while the cd one holds it just fine floating.

https://smile.amazon.com/gp/product/B0175W45I8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

https://smile.amazon.com/gp/product/B01LQWNMPU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Not specifically related, but I've really enjoyed using the magnetic style mount. They have different styles where you can clip to the air vent or slide into the cd player slot (I don't use CD's so it's perfect for me). No fumbling with the traditional style holders where you have to slide the 2 sides to hold the phone snug. All you need is a metal plate you can slip in between the case and the phone and you're golden.

https://www.amazon.com/gp/product/B0175W45I8