Also the previous signal strength showed red just like my phone would in the bathroom. This ex friend of mine would spend a lot of time in bathroom and recently before we ended the friendship, I caught him lying about using the bathroom.

Previously it showed showed a signal strength of in the red, which is what my own phone has in the bathroom area. I believe an ex friend of mine planted something in my apartment and that it is hidden in my bathroom. The device also renamed itself as an iPhone and now today it doesn't have a name and the connection Type is masked. Only when I log into my router directly does it show. Yet, Fing and my AT&T app don’t show it connected. Recently I took notice an unknown device has been connected to my AT&T home WiFi network.