installation video How to install a HiBoost office/ home cell booster - YouTube
I had a booster years ago and worked great until I eventually got a phone that did not use the frequency the booster supported. But I discovered my carrier offers voice over Wifi. Works great and its free.
Doesn’t ATT require channel 17?
From some sites listed as “Discontinued”.
What makes this product “4K LCD”?
“4K” seems to refer to the 4,000 square feet it covers and “LCD” is that it has an LCD screen?
Commas are hard. 
Makes a big difference if you move it one word to the left in: “I was helping my uncle Jack, off a horse.”
A little late but we purchased a cell booster, different brand, MUCH cheaper, with high levels of skepticism and used it while Rv camping and it worked OK. Meaning we went from 0 or 1 bar to 1 to 3 bars and got data. We got a remote antenna which helped dramatically with performance