Metropcs flash??

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http://androidforums.com – I bought a sprint htc evo 4gphone that had a bad esn,with the intentions of flashing it metropcs,.I have unlocked/ rooted and put (Red_line _V) rom ,question is im a bit confused with the posts,what do I use or (flash) to put metropcs on it?....i have used both Qpst and cdma... (General)