I need help!! Please! <URGENT> EVO

Mar 27, 2011
I rooted my HTC Evo back a few months, and lcd got destroyed at the skatepark, its repaired now, on an old version of miui and i just transferred my number back to it. Sprint said in order for data to work on it, i need to system update, and i cannot find system update anywhere. Plz help. Thanks guys :)