For voice and text messaging. DATA is another system so I'd not confuse the two systems. I don't think it's a good idea to hold cellular network classes here but to solve your issue I'd look at which carrier works best at your location.
Also, call https://www.wilsonamplifiers.com/ and talk to them about possible other solutions. BE SURE TO TELL THEM THAT DATA IS THE ISSUE.
If I use two mobile data boosters in the same space will I get better signal than with just one?
I work in remote locations, my company provides one booster but in the current area it is performing poorly with my phone (AT&T S9+). I get 3-4 bars but web pages won't load.
So if I buy my own booster and combine it with the other will signal improve?
I tried switching to GSM auto PRL from the network testing menu, it sometimes works but usually doesn't (default is LTE/UMTS auto PRL). None of the other network modes are useful.

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