For those who are inpatient like me to wait for OTA... Go ahead & download factory image of 4.3 from above link & follow below steps.
Prerequisite you must have your PC configured to support the fastboot command and you must have CWM or TWRP installed [ Only if u don't want to lose any of your data other wise flash stock recovery ]
open the file called image-occam-jwr66v.zip and extract all content files or at least boot.img, recovery.img and system.img.
In the same directory you leave the above files and 2 IMG coming out of the zip and tgz falling within the following:
Once count on the structure and the previous image files, you should turn off your phone and turn it on in fastboot mode (volume down + power) and connect your phone to your PC and execute the following commands:
fastboot flash bootloader bootloader-mako-makoz20i.img
fastboot reboot-bootloader
fastboot flash radius-mako-m9615a-cefwmazm-2.0.1700.84.img
fastboot reboot-bootloader
fastboot flash boot boot.img
fastboot reboot-bootloader
fastboot flash system system.img
fastboot reboot-bootloader
Tip - Give Enter after each command.
After the last reboot you select the option to start in CWM recovery or TWRP and reformat the cache and the dalvik cache, reboot and expect up Android 4.3 
Enjoy...