My boyfriend and I dont pay internet here at our house but when we get an xfinitywifi signal that is strong enough, we will log into it using my stepdads login info...the signal has never been a strong/reliable connection. A couple weeks ago, my uncle brought over a comcast xfinity router that he randomly found and plugged it in thinking it would boost the xfinitywifi signal, which it did and we enjoyed a strong fast connection....for a couple weeks.....now the xfinity signal is back to its original old self and we are having a horrible time connecting to it. Heres the thing though, my laptop keeps automatically connecting to the router that my uncle found and its letting me online... I dont pay an interent service provider so how is this possible?