Here is a post of mine detailing a recent booster install including pictures.
Gary RV_Wizard said:
getting an antenna higher up in the air may do a lot so a booster that incorporates an external antenna may improve the reliability of the signal. Mount the external antenna on a mast that gets it 12-20 ft above shoulder height.
As Gary suggests, I am using an external antenna, mounted about 25 feet above the ground
Bottom line results:
Performance without the booster: I typically had 1, and occasionally 2 bars (iPhones no longer allow Field Test mode giving signal DB, so bars is all I can report), and also occasionally no service. Data was 1x (also known as "2.5G" by Open Signal, which is what it reported during direction finding). So calls would routinely drop, and no data on the phone.
Performance with the booster: I have 2 bars of LTE, resulting in clear 4G calls with no dropouts, and roughly 1.5-2MB data. Obviously these numbers are well below max 4G speeds, but considering that without the booster I have no data whatsoever, and often no service period, I consider this a huge improvement. And I have that performance from one end of my fifth wheel to the other.
I am dealing with the reflecting/multi-path signal others mentioned, with lots of trees. While I am satisfied with the improvement using Verizon (where my directional antenna is pointed) it does not help my AT&T signal. While the unit is capable of boosting both at the same time, since the antenna is not pointed at AT&T it doesn't see that signal. I am contemplating the alternate install of the highest gain omni-directional antenna I can find and see how that work. This would however mean giving up some Verizon signal strength as I'm currently using an 11DB gain yagi and an omni is likely to be about half that DB gain (what end difference that will make I'll have to see).
I have not dropped a single call since the booster install, where previously almost every other call dropped