Luckily, I have not been in a crash involving a motor vehicle but I have been in some pretty good crashes with other bikes and while riding solo. As of yet, my phone has never fallen out of the case it's in nor has the case ever left the mount. That's not to say it won't ever happen but so far it hasn't. I think that the type of case you use and the way it's mounted has a lot to do with losing a phone during a crash.