Since March 2019 my LTE speeds have been slow. I can't even get a speed test to load anymore. Last test I took showed about 170ms latency, 0.4mbps download, 5.0mbps upload. I have the top unlimited plan (forgot what it's called). As of 05/24/2019 I've used 6.78GB with 3 days left of cycle; most of which was done out of town. Location is 86323, Chino Valley, AZ.
I live with 3 other people who're also Verizon customers. They're sharing a limited data plan but have no performance issues with their LTE.