Congratulations! You just unwrapped a brand-new iPhone! Once you finish going through Apple’s walkthrough to set everything up, you’ll probably want to get some apps installed on your new pocket supercomputer! So we’ve put together a list of some of the most important ones to start you off. You use Facebook. Like it or not, you’ll want the Facebook app on your phone to keep up with the latest in the lives of friends from high school you don’t talk to and relatives you haven’t seen in years.