While we were together my ex boyfriend had my admin password for router. It was set to default settings as I had no clue about any of this kinda stuff. I have since factory reset my router and changed admin and WiFi password, but he is still able to access it, as I noticed and screenshotted an unknown device. How is he doing this and what can I do about it?
How are you sure it’s his device? Maybe you can do a MAC vendor lookup on the unknown device’s MAC address? Then you could at least find out if it’s the same manufacturer as his device.
Maybe that’s not my business, but why is he even in wi-fi range to begin with?