I installed a cell phone booster in my 24.1 Its a Weboost Drive 4G-M. I added a metal ground plane to the top of my fridge vent, ran the antenna wire down the vent and into the little closet next to the fridge. I have had mixed results - in Goblin Valley SP there was no usable signal but I was able to make a call with the booster on. But other times it doesnt seem to do much (mostly trying to get enough bandwidth to stream Netflix). One thing to consider with the 4G-M is getting enough separation between the internal and external antennas. Because the RV does not have much metal - it can be tricky.
I also bought a Verizon Jetpack AC791L hotspot. This thing is great - gets a better signal than our cell phones and provides fast wifi for a lot of devices.
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