When a mobile internet connection shows faster upload figures than download figures this is usually an indication of mast congestion - too many other local users sharing the same cell mast at the same time.
I know this, most normal people can understand this (if I can visually "see" an object, then it can equally "see" me back!) but Three Technical Support will blame everything under the sun but the problem that is staring them in the face.
I have sent my signal figures to them and explained the dish is fixed, pointing directly at the mast and mounted on a mast (ie nothing has changed on my end) The signal RSSI is constant @ -62dB, but the noise is sky high (RSRQ is currently -19.5dB with CQI of 3) on LTE Band 3
Given that I only tend to run Speedtests when I think my connection is "slow" or doing "tests" (ie VPN speeds, tunnels etc), the following is a historical chart of my speeds on Three.
The drop to sub 10 speeds happened between the 19th and 21st of January 2022 and hasn't recovered since. I am pretty convinced Three did something around that time, but after 5 months of beating my head off the brick wall that is Three's Technical support and CEO Complaints Team, I'm going nowhere fast!
I have been through 3 CEO contacts so far. One of them apparently left and didn't even have the manners to tell me, I found out via automated reply! My current CEO contact was away on leave for a few days and promised to reply to me today when returning to office, surprise surprise no email. I have lost count of the number of broken promises, the lies and the contradictory information they given.
When it works, it's brilliant. When it doesn't, it's an absolute nightmare.