Do they throttle upload now?

I was a trashcan customer for many years and I got close to 1 g upload speed consistently. Of course when congestion happens it drops. But the fact I could get that high.

Now after switching out and back I have a g4 router. I took it literally under the cell tower the max upload I got was exactly 100M. That made me think they now throttle upload? The download I got was 1 g bps no problem.

100 M is good but that’s literally under the tower. In my house I could never get above 15. Most of the time just 6-10m