Cell phone was thrown at braking

With a road bike tour I went on the road with about 25km / h. In front of me a cat ran across the road at dusk, I had to brake sharply, at the same time I drove into the trough of a manhole cover.
The spring mechanism, which was above holding the phone pressed down for a split second by the impact (Manhole-well) and by the slowing down lap, the smartphone with full force to the streets.

This may in a product that the phone is "safe" holds never happen. The situation was uncomfortable but also dangerous not only because of the mobile phone. Of course you can remedy the defect with a rubber ring. But it is also about confidence in the product - and was disappointed.

Furthermore:

+ The holder is attached quickly and easily
+ The phone fits nicely into
+ Angle well and uncomplicated adjustment
+ Rotary

- Mobile has a little too much play (you can easily fix by simple means)
- Spring mechanism (as mentioned) weak