For a long time now, we are forbidden to hold a cellphone in our hands while driving, for whatever reason. The expensive contravention usually prevents people from doing it.
Without advocating cell phones while driving - which I totally disagree - we must admit that several applications of our mobile devices are really useful, starting with the built-in SatNav that prevents us from getting lost.
The solution that people prefer is to buy a device designed to fix the smartphone on the dashboard. Unfortunately, those are not suitable for all dashboards and to be honest, I find then expensive, 25$ or 30$, to hold a cell phone...
Especially when a bulldog clip and an rubber band do the job very well!
Watch this video that shows this car tip and several others.