Anyone know how to get a SG2 flashed to Cricket back to Cspire?

I wasn't sure what forum to post this problem in so here goes: I bought a used GS2 today for a great price that was bought from Cspire originally. However I found out the hard way that at some point someone got it setup for use with Cricket and now Cspire can't activate it for me.



Is there any fairly quick/easy way to get the Galaxy 2 back to Cspire specs?



Thanks

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