Someone’s Stealing Your Wi-Fi
This is more common than you think. Sometimes, you’re not even the one taking all your bandwidth. Sometimes it’s an internet thief. Fortunately, there’s a quick way to fix it. First, you can try changing your Wi-Fi password. This is the easiest way to get rid of any unwanted devices connected to your network.
Of course, this goes hand in hand with having a strong Wi-Fi password. Try using numbers, letters, and other symbols, so you make sure no one can reaccess your network. Or at least it’s not as easy.
Some routers or Wi-Fi extenders also come with a mobile app that’ll show you every device connected to your network; you can quickly find which devices are yours and block any other device you don’t recognize. These apps often also let you know when a new device gets connected, so you can make sure if it’s yours or not right away.