Checking in via SMS (U.S. Only)
I've saved the most basic way to use Foursquare for last. Not only is it simple and basic, it also works only in the United States. The method I'm talking about is sending an SMS to Foursquare.
If you don't have a mobile device that can get online—for example, if you have a regular cell phone without Internet access—you can send a text to 50500 with a message like "@ Main Street Theatre! Catching a great flick" to check in. In the next lesson, you see why this could be a hit-or-miss way to check in. In Lesson 5, you learn the ins and outs of checking in, and you'll see why having to guess at what a location is called could be a problem. (Like, for example, "Starbucks" because there could be several "Starbucks" even within a few blocks of you!)