I feel your pain. On the evening of 5/18/2017 I had the same thing occur at my location at zip 65622. My phone's weren't anywhere near the 22 GB Max but both my hotspot and phones dropped speed at the same time going from an average of 12Mb/s to .5/.6 speeds.
I went to Verizon after having slower internet for years knowing that on 3g speeds the slowest should be 400K beating what I had. Now I'm running approx 60K which is 2g speeds.
Prior to this I went a couple of months with great service and now it's an issue. I don't like being felt like I was lied to about the speeds if they are not even going to honor 3g speed service.
I was told by a representative that they had been having issues with 3g light speed lately but couldn't tell me if or when the issue would be resolved.
I took my hotspot to a location today where my phone managed to hit 30 Mb but was still showing the .60 for the hotspot. There was a notice that the speed would spike to begin with before being throttled. This tells me that the speed is being capped at 2g speeds not even honoring the 3g minimum.
At this time if the issue is not resolved very soon, Verizon will have one less family and profit source as well as possibly more if the company is trying to do a bait and switch trying to get people to move to their service.
