Forgot to add* Tech will do this free if your speeds are hindering that bad and you arent getting what your paying for. Everything above was done at our house over the yrs free. extender free etc.
when I was on copper coax we had a tech first run a 50ft ethernet cable to a wifi booster from top third floor, down past the middle floor u walk in from the street, and halfway down (1 of 2) flights of stairs to basement. BOOM he put a wifi extender...
Here in my neighbourhood in calgary i just got fiber installed. Wasnt told it was ready.. just noticed our "internet 150" on copper/coax was always doing 135 download, 42- upload area MAX for 6-7 yrs, and all of a sudden I was doing upwards 180s down...