Brace yourselves, kiddos. Summer is over. Part of back to school, of course, is getting a fresh kit, but it's also important to make sure you have the right smartphone to start the school year off with a bang. Sure, we all want high-end smartphones like the iPhone 4, Droid 2 or Samsung Galaxy S, but they can knock the pocket for hundreds of dollars. Just in case you are a real person with a real budget, here is our list of the Top 15 Smartphones Under $150. [Ed. note—All phones require a two-year contract requirement.]