[iMore.com]

Wi-Fi networks are everywhere and we use them every day to connect our iPhones and iPads to the internet. As convenient as they can be, however, if an old Wi-Fi network consistently keeps connecting when you don't want it to, it can be more of a nuisance than anything. Luckily, iOS lets you easily forget any network in just a few taps!

Full story from the iMore Blog...