Nope.
it's more or less a extension of ethernet over a wireless medium. for most people a wifi device effectively bridges the wireless and wired network on their existing Internet connection. they generally come as part of the router but they don't have to. I manage four at work that are just bridges.
what wifi is not (most places) is a wide area network. that's why the iphone supports cellular networks. wifi is very localized.
you need to own or have available device that supports wifi to connect to. these devices generally have a range of about a house, sometimes up to a football field
do you have one of these available to connect to?
We are talking here about a Wireless Access Point, WAP. The question is do you have a WAP to connect to?
If so, then on the iPhone go to Settings>WiFi>On>Choose a Network. Do you see a network name? Is there a check mark next to it? When you choose it, and see the detail, is there an IP address, 198.162,xxx,xxx, for the Router? Is DHCP the choice between DHCP, BootP, Static?