usb device not recognized Verizon SCH-i920 Omnia II

[Guest homegrown]

My data cable has been messed up for a while ...... even have a new one and still windows 7 ultimate 32 bit will no longer recognize my device......I want to re-flash one ofAMDZero's roms but i am 2 scared 2 screw up..... Can someone plz help me?