HTC Evo 4G - flashed to Boost by someone else. Need help to unlock 4G and hotspot.

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http://androidforums.com – So I have an HTC EVO 4G that was flashed to Boost by someone else. I was told my Samsung Galaxy Prevail was my "donor phone". However, I tried adding 4G and hotspot to my Boost account today and the CSR I talked to told me that service isn't available for a Samsung Rant. I have NO clue how this phone was flashed, whether it was rooted or not. I've been desperately trying to figure out how I can unlock these functions. Any idea where to start with this? I'm new to all this phone rooting and stuff, but I'm not completely technologically impaired - I managed to jailbreak a few iPod (General)