Wifi signal is influenced by lots of elements and the most important factor is placement. Do not put you’re your router behind closet or in medium cabinet. Putting your router in a covered place can weaken the wifi signal. The best place to set your router is the open space and at least a few feet off the ground.
If you use an Ethernet cable to connect devices that are close to the router, pay attention to the 2 frequencies—use 5 GHZ. There are also other aspects need to be improve such as operation system and your Internet service provider. For detailed information please check the video below: