We spent a couple weeks at the Four Corners area this spring.
Particularly canyon areas had “dead spots” or difficulty maintaining a connection, and some mesas and plateau areas had better coverage but not always. I don’t have a fancy unit - nor do I “need” a cell-phone but it was damn nice to know that in a true emergency situation I could possibly make the call and save a lot of hassle. In that vein I sought to increase the coverage.
I thought of an external antenna but am unfamiliar with how they work. Is it possible to setup a random wire antenna of 50’ and wrap a few turns around the phone and obtain more gain via induction? I actually tried this, sort of, and showed 2-4 more chiclets on the signal strength indicator. Still unable to connect.
I also seemed to have much better luck, though, (I’m not making this up) if I was barefoot and in contact with solid ground. Strictly anecdotal, but I wonder if this improved the ground plane in line with the external antenna idea?