cell tower coverage

I live off of 75 (path valley road) and there is one tower on that road for tmobile but the trees and mountains block the coverage completely so i cant get it. i live closer to fannetsburg and theres a tmobile tower but i believe its 10 + miles away. my phone gets 2-1 bars but very unstable. I also have tmobile home internet lite and somehow when i put it in the highest part of my house i get 2-3 bars and it is somewhat consistent, but i feel like it  could be better. yes i do live in the mountain but i believe there is potential for possibly another tower or a solution to my problem.