How to Know If Someone Is Stealing My Wifi
A slow internet connection is often the first sign that something's amiss. If you notice that your speeds are slower than usual, or that your connection keeps dropping, it could be a sign that someone else is using your Wifi. Check your router's lights and settings to see if there are any unfamiliar devices connected.
Another way to detect Wifi theft is to check your network's admin page. Most routers have a page that lists all the devices connected to your network, so if you see a device you don't recognize, it could be a sign that someone's stealing your Wifi. You can also use software like Wifi analyzer tools to scan your network and detect any unknown devices.