Review on Powerful Magnets: Humixx Car Phone Holder Mount with 360° Rotation - Universal Magnetic Cell Phone Holder for Car Dashboard, Compatible with iPhone 13 Pro Max/12 and Samsung Galaxy S21 Ultra, Rose Gold by Mark Walsh

So far, so good. Time will tell if it sticks to my dash, maybe the heat will affect those overtime. I think it's important that it is mounted or placed on a somewhat horizontal surface and maybe smoother than rough. I think surface prep is also very important, I masked the area I wanted to surface prep for and then cleaned it very well with isopropyl alcohol (isopropyl alcohol can stain darker plastic so if you don't want stain damage in your car, You can test it on an inconspicuous spot, the cleaning cloth that comes with the mount kit is pretty much useless to me). The phone I use is quite heavy, it's an iPhone 8 plus with an OtterBox protective case. I tried putting a metal disc on the inside of the rubber but it was too thick to magnetize properly. I ended up cutting a slightly larger hole in the rubber than the metal washer that attaches to the back of the plastic case and it works great. Being initially paranoid about whether this would work, I ended up using a piece of parachute strapped to the phone while it was on the mount just in case it let go of the phone and not onto the crashing ground. I drove on bumpy dirt roads, there were no problems.