There are loads of custom ROMs available for the smart phone of hearts, the Samsung Galaxy S3. Among the hordes of custom ROMs, we have selected a few based on the latest Android 4.2.2 Jelly Bean firmware and Android 4.1.2 JB firmware to help you a bit with your selection. We would try writing about more best custom ROMs for Samsung Galaxy S3 in future. For now, do try some of these and let us know about your experience.
Some popular custom ROMs to get your Samsung Galaxy S3 to Android 4.2.2 Jelly Bean:
SuperNexus 2.0 Build 4: The SuperNexus has zero bloatware and is super light and fast. Giving the same feel as of Google's Nexus stock ROM, the ROM is now also running on Android 4.2.2 JB with latest features from stock AOSP ROM. SuperNexus was popular earlier for providing Vanilla Android experience on Samsung Galaxy S3. But with 4.2.2 comes even more functions and capabilities. SuperNexus runs smooth and incredibly fast.
AvatarROM 2.9: Based on CM 10.1 and Android 4.2.2, AvatarROM has some amazing theme-ing options for MIUI. With this ROM you will get a built-in app to change the theme, custom launcher with many customizations, bazooka launcher, messaging app, boot animation, font theming and more!
Liquid Smooth v2.3: One of our all time favorites: the liquidSmooth custom ROM for Samsung Galaxy S3. Based on AOSP and running on Android 4.2.2, Liquid Smooth v2.3 is having a lot of visual improvements and performance tweaks. Some of the newly added functions include in-call recorder, Statusbar Auto-Hide, Media Scanner Behavior On Boot, Custom Shortcut Quick settings Tile, Blacklist Unknown Number Functionality, Option To Mark User Rejected Calls and more. Read here for more about it or install it for SGH-T999 and i9300.
Slim Bean Build 5. Another favorite original ROM from an amazing team of developers, Slim Bean combines the lightness of Android 4.2.2 AOSP with some incredibly cool customization Features like hands free (allows you to take photos using the proximity sensor), Nova launcher, smart capture, blacklist unknown numbers and many other performance optimizations are included. Install Slim Bean for Galaxy S3 T999 or read this for more.
and now some custom ROMs for Galaxy S3 based on Android 4.1.2:
Sotmax JB Ultimate Stock V19 HD Voice: Sotmax runs on Android 4.1.2 XXEMC3 and provides root access with performance optimizations with no visual changes in the stock ROM. Sotmax custom ROM for Galaxy S3 has the "stable as rock" slogan to give you an idea of what to expect. Stability, performance, some modifications like SNote from Arsaw, 4.2 camera from Nexus 4, improved RAMand speed, changed UI sounds, weather in lock screen, transparent multi-window, paper artist app, and some other features from SGS4 such as boot sounds, touch sounds and music player are included in this stable ROM for SGS3.
Android Revolution HD 26.0: Android Revolution HD for SGS3 runs on Android 4.1.2 XXEDM2 and brings not many changes visually with loads of improvements in stability and performance. To have a ROM that runs smooth and fast go here to learn more about the Android Revolution HD Android 4.1.2 ROM.
XperianZe 0.99: Running on Android 4.1.2 XXEMC3 and having taken so much from the Sony Xperia Z, it is set to give you some SONY Z experience on your Galaxy S3. XperianZe is a very clean ROM with size weighing just about 416 MB. Many features and visuals in the launcher, keyboard, lockscreen, fonts are from Sony Xperia Z. Lite Camera MOD for better filming quality, Bravia engine v.2, Media Scanner fix, Call recorder, the latest Play Store installed, MultiWindow Control and more is available with XperianZe. Head to this XDA developer page to learn more about this custom ROM for Galaxy S3.