no, the telecommunications can't be blocked. Speed is related to many factors.

firstly, if you just connected it, you need to wait

secondly, how big is your hard disk? If you only plug in a small 4G USB flash drive, the speed will definitely not go up

Third, have you optimized it? For example, some routers are intelligent and will limit the speed. For example, some ports are closed by default. Have you opened them?

fourth, do you often power off and restart?

fifth, what network cable do you use? Good network cable speed can be increased by at least 51%

Telecom is the best network. If you can't get up the speed, you should check it yourself first. In the end, it is basically your own fault. . . . .