After being without my Air for months, it's now back with it's daddy. Never been so happy. Needed repairs which I couldn't afford for a while (turns out it was covered by warranty anyway, bloody fool that I am). Anyway, I've noticed that my wifi signal is now kick ass. The repair was a new logic board, which I assume would also mean a new wifi antenna. I never used to be able to connect to my own wifi in my bedroom, because it was three floors away from the router. But now, I'm getting full bar connectivity and kick ass speeds (the Internet is normally slow as hell for everyone else at the house). I'm just wondering how could this happen? I've checked I haven't accidentally connected to someone else's network and it's all legit. How could the quality of signal change like that between logic boards? Because for a cheap G router 3 floors away I would assume that the rubbish signal I was getting before was accurate. tldr How the hell am I connecting to a cheap old Netgear router three floors away and getting excellent connectivity and speeds? And why does the quality of wifi antenna between different MBA logic boards change so much?