Need Help !!! CDMA Flashing (From Cricket to Verizon)

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http://forum.xda-developers.com – I really needs some help. Didn't think it would be so hard. My gf put her phone on Cricket to pay less. Now she wants to come back to verizon because her service was terrible. I've been looking at CDMA flashing tools but I am clueless when it comes to how to use it. Anyone with any answers, Thanks in advance. (HowTos)