I have a TELUS Hauwei hub and it is generally very poor speed. The tests will show a speed upwards of 10mbps but quickly drop to 1.? mbps.
I've called Telus support, they can refresh my line, but that doesn't help. They suggested I reset my hub to the factory setting, and that produces about 8mbps. I thought these hubs should get about 15 mbps. Am I mistaken?
I am pretty much in the same boat as you with my ZTE hub. For the first three months of service it was 10~15 mbps which in my rural area is great. Right now, well, 0-3 mbps and spending a lot of the time in the kbps range. Go through the contact process. With me they escalated the problem and I am waiting on an “engineered antenna” solution.
You should be able to use a browser to access your hub (read the fine manual) and that will give you a lot of information; speed, signal strength (my problem) etc. The direction and location of the hub can make a difference too. As other people have stated it could be too many users on a tower. I am told my hub was/is switching between towers, and not always picking the best one.