I was visiting a friend who lives on Cove Hollow Path, Carriere, MS 39436 and found that I had no service, even outside. I found this curious since this location is only about 3km from a T-Mobile tower, which is located just off I-59 at Chester Cr and which has 700 MHz. (One of two counties in MS where T-Mobile has a 700 MHz license.) Then I looked at that tower which appears to have just two sets of antennas (not the usual three) for T-Mobile. This type of arrangement was originally deployed in the belief that there was nothing worth covering on either side of the highway and it saved a small amount of money for antennas and heliax cable by not installing the 3rd antenna.
I can understand T-Mobile not adding the 3rd antenna when doing a ground-based upgrade to LTE, which didn't require sending anyone up the tower. It's absolutely absurd to go into a situation like this where you have to upgrade the entire site, replace air units, etc. and not add the 3rd rack to make it a 3-sector site. It's not like there's a complex coverage pattern in this area that would have to be rearranged. It's the only tower in 5 miles. For T-Mobile to compete with AT&T and Verizon, they are going to have to change their mindset regarding rural markets.