Check the Cables – Especially at Home
Even though WiFi implies wireless communication, the cable which goes from the wall to the router can often be the culprit. Telephone cables which are used for DSL internet can go bad. If they are stepped on or if they have bad routing from the wall to the router, they can result in a connection loss and thus a loss of speed.
One of the answers to the question of how to improve WiFi speed is the cables. Fiber optic cables are also a potential culprit and should not be bent more than necessary. The connectors on the cables are very sensitive and if they are dirty, that can affect the signal.