After rolling out their Bootloader Unlock Tool for their HTC Sensation to European users, HTC has now rolled out a new Evo 3D Bootloader Unlock Tool to the US. The new bootloader unlock tool update was announced on the HTC Facebook page and is now available for the EVO 3D for Sprint.

HTC explained via their Facebook page:

We’re pleased to share that the EVO 3D for Sprint unlock process is now available. It requires a software update, so please update your phone via the "About Phone” menu before starting the process. Please check HTCDev.com for updates, as well as a detailed explanation of the unlock process.

More information about the available HTC bootloader unlock tools are available on the HTC Dev website.  But be aware unlocking the bootloader on your phone will voids the phones warranties.

Source: HTC : Tech Crunch