Hi bro i already installed the kitkat ROM and FYI, i upgrade using mobile upgrade S after installed this custom ROM and now i got 4.4.2 01006 build.
so i guess were not the only one who got kitkat on mobile upgrade S.
well this phone is a almost 1 year old and no active rom making anymore. if you want you can try porting roms. agree that custom roms can make difference such as in speed and performance. but by tweaking the device you can also achieve this even when in stock rom. try to do some experimenting like tweaking build props, uninstall unnecesary apps, deodexing rom and others
changelog for 11-14-14 release
※ Major Update:
※ repair the lock screen missed calls, call recording time Sort confusion
※ set up a contact when repairing specific ringtones preview ringtones no sound problem
※ The maximum limit of 300KB repair MMS
※ When repairing a new contact or group, screen flicker issue
※ iron should be part of the proposal, this new Google service S950 software version, which is built into ROM package google all relevant apk. This version is for iron users want to experience the full version of the system, not like a friend can continue Lite experience.