If you are looking for a good Android 4.4.1 KitKat ROM for your AT&T SGH-i747, T-Mobile SGH-T999, or Canadian SGH-i747M/T999V, check out Quantum ROM.
Based on CM11, Quantum ROM brings you a custom-tailored Android 4.4.1 experience to you along with some cherry-picked features from other custom ROMs also. One thing I really like about this ROM is that it’s quite fast and does even come with its own Quantum kernel to boost your battery life to the fullest while giving you added performance.
You will also find additional UI customization you can do for your status bar, quick toggles/tiles, notification bar, and lockscreen, that may get you a bit more customization than a stock CM11 ROM.
Also, camera/camcorder works flawless out of the box with even photo-during-camcorder feature working which you can easily upgrade to PhotoSphere camera (as it doesn’t come with it).
Overall, I do highly recommend Quantum ROM for those of you with AT&T, T-Mobile, or Canadian Galaxy S3 as it performs great and battery life is solid while everything works out of the box. So, definitely give this guy a go over the week(end) and do let me know what you think!
Download Quantum ROM for Galaxy S3 (For AT&T SGH-i747, T-Mobile SGH-T999, or Canadian SGH-i747M/T999V)
Download Android 4.4 Gapps (DO NOT USE OLDER 4.3 Gapps you will FC!!!)
NOTE: You need to update you CWM Recovery to v22.214.171.124 or higher OR also update your TWRP Recovery to v126.96.36.199 or higher. You can use either ROM Manager app or Goo Manager app from Play Store to update.
To install, reboot into recovery, make backup ROM, wipe data/factory reset, install ROM, install Gapps, and reboot. (If for some reason you end up in a bootloop, reboot into recovery, go to Advanced Wipe for TWRP or Mounts & Storage for CWM, format/wipe /system, then re-install ROM.)
Note: CM11 does not have root enabled by default but you can easily enable it for adb & apps in Developer options. If you do not know how to do this, see this video.
Download Flash Player APK (if you want flash player use with Dolphin browser)
DownloadAndroid 4.3 PhotoSphere (if you want photosphere, but may force close so make a backup of your Gallery app using Titanium Backup app before installing! )
If you want to run your apps in tablet/hybrid/custom DPI mode, see our Xposed App Settings guide.
If you want PIE Controls, see our LMT Pie Control guide.
If you want some awesome audio, check out Viper4Audio FX MOD, which you can install on this ROM to enhance your music 100%.