Posted this in the other 4.4.2 thread I figured it would be easier to find in it's own thread.
Flash in Stock recovery >Recovery_Cingular_US_3.17.502.3.img >> http://d-h.st/6bH
flashing stock recovery
boot the phone to fastboot usb
open command prompt from the fastboot folder
fastboot flash recovery Recovery_Cingular_US_3.17.502.3.img
fastboot erase cache
now your ready to flash the ota.zip
Many have problems just using the stock recovery alone.. if this is your situation you need to RUU back to 3.17.502.3 First.
I posted the link here >> http://www.androidruu.com/getdownloa...5_signed_2.exe
If your s-on you'll have to lock the bootloader before flashing the RUU
fastboot oem lock