if you have superuser access you have half root
if at hboot at the top you see s-off you have nand unlock
if you have both you have full root
just use this it will update radios and wimax and will bring you up to 2.2
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[All-In-One Update, INCLUDES Updated Baseband & Wimax Radios + PRI 1.77_003, Uninstallable apps] This ROM is based on the latest OTA update (3.29.651.5) and includes all of the Sprint goodies with a few extra twists! Those who knew me from Windows Mobile know my dedication for keeping a stock-like ROM with as much user choice as possible.