Hello and welcome! Allow me to introduce you to Sprint's next big boy phone: (deep breath) the HTC Evo 4G LTE.
This is Sprint's version of the HTC One X. HTC's much publicized "One" branding strategy survived a grand total of two carriers in the US - Sprint kicked it to the curb in favor of the aforementioned alphabet-soup-style naming convention. Keep in mind the original Evo was actually called the "HTC Evo 4G," so you're going to need to be detail oriented when talking about the Evo line. But hey, considering this is the same marketing department that birthed the novella known as the "Samsung Galaxy S II Epic 4G Touch," we actually got off pretty light.