Cell phones have come a long way since the Star Trek communicator-like flip phones of the 1990s - modern smartphones now do email, SMS, instant messaging, web browsing, Twitter, Facebook, and many more applications. At the same time that the functionality of phones is increasing, the sea of possible phone options is also swelling, and the nonprofit techie must don a Captain's hat to navigate all of the different types of phones and make them work in your office. Here's a short primer on smartphones, and some tips on which ones work best in various situations - so that when the next person comes to you and mentions that their phone contract is almost up and they're thinking about getting something new, you'll have some advice that will make their transition easier.