How to Join a Wi-Fi Network on Your iPhone or iPad
By Paula Bostrom
Unless you have unlimited data on your iPhone or iPad, it is imperative that you use Wi-Fi whenever possible to avoid costly overage charges on your cell phone bill. You probably already use Wi-Fi at home and at friends' houses and fortunately, free Wi-Fi can also be found in public spaces, from coffee shops, to libraries, and even fast-food restaurants. Most hotels offer free Wi-Fi as well. And if you’re traveling overseas, virtually every function of the iPhone can be performed using Wi-Fi so you don’t have to pay international phone costs.