These are something that I do not often use; but when you need an internet connection ffor yourself, or even for someone else, then you can turn your phone (or iPad) into an live wi-fi connection if you have one. If you are traveling and only have wi-fi on your tablet, but have a hotspot on the phone, then you can pretty much connect anywhere that you have a phone signal. Another service that Xfinity (Comcast) provides is called Xfinity Wi-fi, and it comes along with the regular internet service. What they have done is to turn wi-fi connections that are for places like apartment complexes or fast food restaurants, and other businesses into kind of a public hotspot. Anytime that you are in range of one of these hotspots, you can connect to it, even without having your own personal hotspot. They have an app so you can see if you are close to a hotspot. Once you log into Xfinity Wi-fi, then you can pick it up anywhere and it shows in your list of nearby servers.