Definition of Wi-Fi: How is Wi-Fi Useful for Mobile Phones?

Wi-Fi, which is a trademark of the Wi-Fi Alliance, is short for wireless fidelity.

A device with Wi-Fi can wirelessly connect to the Internet when it's range of a wireless router that is hardwired to the Web.

While Wi-Fi can be used with many devices, how is the short-range technology specifically useful for mobile phones? What are some issues with Wi-Fi? Learn all about Wi-Fi here!