Hotspot

did you by chance test your speeds with the device by itself to see if there are any notable differences between before the maintenance and after? or are the normal data speeds the same but the hotspot speeds are the only thing affected?

with that being said though as @gramps28 pointed out you’ll need to check your plan and see what all is included with your mobile hotspot. some have a 15GB max out and after that it drops you to 3G speeds..you might be on a plan that has 50GB of hotspot usage before this happens..or the 15GB one..dont think you would be lower down the list but if somehow it was a fluke with your prior speeds you might be on the plan that has unlimited 3G only speeds.