If some is interested in trying out Kitkat 4.4 after latest update u can try it out
1. Install the clock work mod from odin PDA section u can download the latest CWM recovery from http://download2.clockworkmod.com/recoveries/recovery-clockwork-6.0.4.3-d2usc.img for US Cellular latest one be sure to use only CWM only as TWR is not working
2. Download latest version of CyanogenMod CM11 from http://download.cyanogenmod.org/?device=d2usc and latest 4.2.2 gapps from here http://goo.im/devs/paranoidandroid/roms/gapps/pa_gapps-stock-4.4.2-20131215-signed.zip after downloading copy both to your SD card
3. Boot your phone to recovery mode and wipe data/factory reset , wipe cache and wipe dalvin cache and after that select install from SD card and select first CM11 file and after finishing it out select the GAPPS after compeletion reboot your phone now u will be on Kitkat 4.2.2
This can be done on the phone which got stuck on boot screen of Samsung logo for the mobile which got strcuk after downgrade to 4.1.2 from 4.3 official update
Note : Mobile data is still not working on Kitkat 4.4.2 and personal feedback after using it is every thing is smooth voice,SMS, WIFI every thing is working fine. And it will also trigger your KNOX bit from 0 to 1