What has you confused? It can be used with both WiFi and Cellular. You want to use WiFi has much as possible to avoid cellular charges, usually cell data is more expensive. You must subscribe to a provider and buy either a monthly package of data OR data packs, but WiFi you can use where ever there is a zone, your home (which you already pay for anyways) and out and about in free zone such as at cafes and in parks and such. Some cable provider such as Comcast (Xfinity) provide free WiFi to existing customers while they are out and about. In Philly these Xfinity zones are EVERYWHERE! You could probably get by with a WiFi only iPad BUT the cellular model gives you the freedom to have a connection almost everywhere! Even if you can't find a WiFi zone, for sure you should get a cell signal in most places.