Here is a way to positively identify which VERIZON cell tower serves your location by using ONLY your cellphone which is much easier that carrying a laptop around to do a site survey. I learned this from a cell tower technician who was working on the cell tower. BTW, if there is only one cell tower near you, you probably already know.
First: Find the location of all the close-by Verizon cell towers near your house or business. Don't be concerned that you may miss one because this method will identify if you did miss THE tower serving your location.
Second: Stand in your house at a spot close to where you use your cellphone or modem or close by your external antenna. Then dial #878# and listen carefully. You will hear a computerized voice say something like, SWITCH 59 CELL TOWER 122 SECTOR Gamma. You may have to listen very carefully, the nice lady speaks softly, but she repeats herself a couple of times. This now means that 59, 122, Gamma is YOUR cell tower; the one sending the signal to you at your home because you called it from your home.
NOTE: As you may have already noticed cell towers have three vertical antennas spaced 120 degrees apart so they face in three different directions. Remember this with regard to the SECTOR because there are Alpha, Beta, and Gamma sector antennas on each tower and one of them will be the one facing closest to your home's location. Of the three antennas:
Alpha is the North most FACING vertical antenna on the cell tower
Beta is the Southeast most FACING vertical antenna on the cell tower
Gamma is the Southwest most FACING vertical antenna on the cell tower
BTW, the longer ones are the vertical 4G antennas.
Third Let's assume that from your location in your home, when you dialed #878#, the computerized voice said SWITCH 59, CELL TOWER 122, and SECTOR Gamma; therefore, a Southwest facing cell tower antenna is the one being used for the signal with regard to your location. Write this down and also write down the signal strength you are receiving at your home location. For this example let's assume it is -84 dBm so you have written down: 59, 122, Gamma and -84 dBm.
Fourth and last: Drive to each cell tower that is close to your location and stand BETWEEN the cell tower (Gamma Southwest facing antenna) and where your home is located. Stand 500-1,000 feet away from the tower and dial #878# and write down the info. For example, let's assume at this first tower it was Switch 59, Cell Tower 194, and Sector Alpha. Therefore, in the third step above the reading at your home was 59, 122, Gamma so this is NOT the tower you are receiving at home because it's ID is 59, 194, Alpha. Go to another close by tower and redo step four.
When you find the cell tower that your modem or phone is connecting to at your home the info from dialing #878# will be Switch 59, Cell Tower 122, Sector Gamma which matches what it was at your home. If your at home signal strength was -84 dBm it may be something like -39 dBm when you are standing next to that tower. At this point you found THE Verizon cell tower you are connecting to by matching the 59, 122, gamma and the increased signal strength adds a little confirmation.
This has confirmed which Verizon cell tower serves your location so if you have a directional antenna you know exactly which way it should to face. After doing this I moved my Verizon Pantech UML290 4G modem across the room 10 feet away from were it was and that increased my signal strength significantly! Also, I noticed that I get a better signal strength on my charge phone in that same area so now when I do a backup of my contacts I set my Charge phone there for 2-3 minutes while the contacts are being backed up.
In my case it fooled me because the VZ tower that I am always connected to is NOT the one that is closest to my house so it surprise me. I am being connected to a tower that is about 1/2 mile further away.