For those that are tired of checking and waiting or playing the date game. See the last post in link below and be sure to thank reinbeau for hosting the file:
AT&T to release OTA update on Dec. 27 to enable Multi-Window on Note II
Ok, guys, go blow up my Mediafire account. update.zip. I used the /cache method and stock recovery, didn't wipe my phone but did break root; you are welcome to CWM it in Recovery, but it will wipe. Enjoy it while it lasts
Download the update zip file from the link that is referenced in above post. Root your phone and use root explorer to copy to /cache. Once copied; do full unroot, reboot into recovery, flash from cache, then reboot and enjoy 4.1.2.
Another note: Just to clarify, this update file is for stock 4.1.2 that is sent via OTA. Also, I suggest to unroot before installing the update because it will break root. You can root again using the exynos exploit after applying the update. Also, this process does require stock recovery!
If you do not want to root your phone. You can save the update.zip on your external sdcard and apply from there but by doing so I believe it will wipe your device. By updating from cache, I was able to update my wife's phone without it being wiped clean.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app