OTA is out of the question since you unlocked. But you can still flash the 4.3 firmware zip in CWM to get to the correct bootloader.Thank you for replying.
But I had already unlocked the bootloader on 4.2, does it mean I will never be able to update it thru OTA to 4.3?
I feel not good but still thanks a billion.
You will have to flash CWM again after the update and then you're good to go and flash CROMi-X.