A Ram single socket arm attached to the threaded holes for the windshield tie down loop. https://rammount.com/collections/popular-components-b-size/products/rap-b-200-1-293u#
I used that because its the shortest configuration. And a Ram tablet mount is holding the tablet.
View attachment 499747
View attachment 499748
View attachment 499749
Cell based GPS doesn't always work, I've been without it places in New Mexico and Death valley. I noticed if you start a trip while in cell coverage you can sometimes make it through a dead zone but if you try and start a trip in a dead zone it's a no-go. Something to think about it you like to go off the beaten path and who that owns a Jeep doesn't? I used to carry my old Magellan Satellite GPS for that reason but I also believe in maps and a compass.