During an event in NYC hosted by Sprint and HTC, together they made the HTC EVO 4G LTE official on Wednesday April 4, 2012.
Confirmed pre-order date: Monday May 7, 2012
Release date: Q2 2012 -- (UPDATED 4/18/12 - We have heard from a source the HTC EVO 4G LTE release date is Friday May 18th)
Confirmed Carrier: Sprint
Announced pricing: $199.99