Hmmmm - it's worth knowing about this issue (breaking phones), but I have been using an X-mount on the handlebars holding first an iphone 7 plus and now an iphone 8 plus for about 18 months in which time I have done 32k miles. So far I haven't had a problem. I don't take mine off road, but I bought another X-mount for my hybrid push bike on which I have done 2000miles in a year quite a lot off road on bad tracks. I think (hope) that mounting the Xmount on the handlebars is reasonably safe. I decided not to use the high mount in the screen even with Vlad's screen brace as the phone rattled around very violently even on tarmac.