Ram mounts, google them, if you must.
However, I'm a strong proponent of keeping your cell phone on your person. If you get separated from your bike you might be able to call help.
Visiting in a ICU waiting … struck up conversation with a lady … she was there visiting her brother. He had went off the road and lay in field for six hours before he was found. He survived fortunately.
And then there were these two guys who crashed off the Dragon … one was killed, the other lay there all night before being discovered the next day. He recorded a final message/last wishes to his family on his cell phone in case he didn't make it. Thankfully he did.
And the little old people in my churches are always falling … on more than one occasion they lay there all day because they can't get to their phone and their cell is out of reach.
Our cell phone a wonderful security blanket. I keep mine in my breast pocket at all times when riding.
If I use GPS, I just run it thru my bluetooth.
Something to think about.