SuperNexus ROM: http://forum.xda-developers.com/show....php?t=1817345
This ROM is built entirely from Google's JellyBean source code. I'm actually working on my upcoming ROM "SuperNexus". So I just compiled a pure AOSP JellyBean for the Galaxy S3 so i know that I can add support of it in my SuperNexus ROM. This ROM might only get 1-2 more updates because I will release SuperNexus very soon. I'm using Teamhacksung's Device Tree and patches in this ROM so Big Kudos to Teamhacksung (Donate To Them). Also big thanks to Codeworkx and Xplodwild for working so hard to fix Galaxy S3 stuff and making it compatible with JellyBean.
System Details:
- Android ICS 4.1.1 (JRO03H - Android-4.1.1_r3)
- Latest CM Source Compiled Kernel
- All JellyBean Features and Apps (Nothing excluded from AOSP)
- No Visual Changes!
- Stock JB Look and Feel
- This will turn your Samsung Galaxy S3 into a JellyBean'ed Galaxy Nexus

ROM Features:
- Fully Deodexed
- Zipaligned APKs
- Rooted (Super SU)
- BusyBox Installed
- No 3rd Party App
- ZERO Bloatware
- Official JB Bootanimation (From Official Galaxy Nexus Android 4.1.1 Factory Image)
- Init.d Support
What's Working
- WiFi - BT - NFC
- HW Composer - Sensors - Audio
- Data - Calls - SMS - MMS
- Mostly Everything is Working

Known Issues
- Wi-Fi tethering is semi-broken
- Memory Leak
- Found one ? Report it.
Screenshots:




Video by TotallyDubbed:
Requirements:
- Clockworkmod Recovery (CWM)/Any custom recovery
- Wipe if coming from any other ROM
Instructions:
- Copy Google Apps and ROM to your internal SD Card
- Enter Recovery
- Do a Wipe/Factory Reset
- Flash Android 4.1.1 JB ROM
- Flash Google Apps
- Reboot your device!
- Voila!

Downloads
Latest Build:
- AOSP-JB-I9300-BUILD3 MD5: 6FB936B0F8CD57E0789192C50E638344
Google Apps:
Previous Builds
Source Code:
Changelog:
AOSP JB I9300 BUILD3 (30-07-12):
- Fixed Play Store issue
- Fixed SD Card issue
- Fixed Google Now FC Issue
- Added APN List
- Added SPN List
- Added Device Asserts in Updater-Script (So noobs don't flash this on a different device)
- Initial Release
Credits:
- Codeworkx
- Xplodwild
- Teamhacksung
- CyanogenMod
- Nebkat
- Chainfire
- Goo.im (Buildbox)
- Thanks to all who donated or thanked
Donate:
If you like my work please consider a donation as it will help me keep this development alive and it will be contributed in my MacBook Pro fund.
God
Sent from my GT-I9300 using xda premium
For now launcher is giving me FC's so can't explore it much but I went into the settings and man this is FAST!
Now just to make it function properly with specific hardware, sensors, etc....
...
SO FIX IT >:O
Thanks
In all honesty though, how much faster can it actually get? The S3 is already lightning fast imo. Not really sure how it can get much faster lol.
WOW! Looking forward to see what can be done with this...
Quick someone give this guy a medal
Sent from my iPhone using Tapatalk
Good job bro, I can't wait for it.
Sent from my GT-I9300 using Tapatalk 2
Is it functional?
Does Google Now work?
Faryaab the 15 yeah old genius
Giving it some beans on my blue s3 Powered by CheckROM EvoHD V2