Wifi is one of those wireless technologies we tend to take for granted these days. But it wasn't always a given. Those of us old enough to remember the early days of mobile remember shaky connections — if our devices supported Wifi at all. Or maybe we remember expansion cards that would free us up form the shackles of desktop syncing. Or extend our battery life by offloading the cellular work.

Whatever. Wifi is everywhere, and it's important as ever. And this is everything you need to know about Wifi and Android.