Review on Rokform – Magnetic Phone Mount with Twist Lock and Adapter, Secures to Various Smartphones, Phone Cases, Tablets, or Flat Surfaces using 3M VHB Adhesive (Black) by George Bridgewater

I have motorcycle, car and mountain bike mounts. They all worked great until I rode my mountain bike down a bumpy trail. The trail was so bumpy that I didn't notice the phone flying off the mountain. It was impossible to find a phone as the trail was partially covered in ferns from recent rains. The mount is still there and I assume it's still on the back of my old phone in the woods. Good mount, just not for real mountain biking. Make sure to add a tether or buy a new phone like I did.