Review on 2021 Newest Bike Phone Holder Mount: 360° Rotation Universal Adjustable Motorcycle Phone Mount - iPhone 11/12 Pro Max/Pro Max/11 Pro/XS/8, Samsung S20 Compatible - 10 Years Refund! by Duy Desperado

I was looking for a secure mount for a large phone (S20 Ultra) with a case (Armadillo) while cycling. It's a little difficult to get the silicone pieces over the phone + case, but they fit. It seems easiest to start with two diagonally opposite corners. Once the phone is in the cradle, it's pretty solid. The phone is mounted fairly high above the steering wheel, so make sure it's right for you. The reason for the 4 star rating instead of 5 is that the mount has a lot of plastic components: it's not all metal like I expected. The ball joint in particular is plastic and doesn't snap tightly into place (i.e. the phone moves if I nudge it lightly). I didn't dare try it on my mountain bike, but it works fine on my exercise bike.