If you are looking for an AOSP ROM for your Galaxy S II then I strongly suggest the F1 GalaxyNexus AOSP ROM. I must say that this ROM is 100% pure Galaxy Nexus experience. It is very stable and battery friendly ROM. It uses CyanogenMod 9 Kernel and also it runs on Siyah Kernel if you want to use it.
The sole purpose of this project build is to give Galaxy S II users the pure Android Ice Cream Sandwich experience. I am using this ROM for almost a month now and I have no complains whatsoever.
ROM Features:
- Fully Deodexed
- Zipaligned APKs
- Rooted (Superuser)
- BusyBox Installed
- No 3rd Party App
- ZERO Bloatware
- Official ICS Bootanimation (From Official Nexus S 4.0.4 Firmware)
- Extended Power Menu (Reboot, Recovery & Download)
- Galaxy S II Settings In The Launcher (Device Settings)
- Tweaked Scrolling Cache (Smooth Scrolling)
- Huge APN & SPN List (Thanks To CM)
- Patched Settings with F1 Version
- EXT4 File System Optimizations
- SD-Card read ahead Tweak
- Init.d Support
- Fully Working Mass Storage
- T9 Dialer Functionality
- Landscape Dialer Support
- Notification Toggles (Press and hold the settings icon in the notification bar to reveal them)
- 180 degree rotation enabled
- Both MTP/UMS Support (Settings>Storage>Press Menu>USB Computer Connection)
- Video Recording in MP4 with higher bitrate and Stereo Audio Recording
- Storage Option In Camera (Internal SD Card, External SD Card & USB Storage)
- F1ROM Build Prop Tweaks
- Enabled GPU UI rendering
Download: F1 GalaxyNexus Build 4 (01-05-12) [This will WIPE your device! (Not your SD Cards)]
Requirements:
- Clockworkmod Recovery (CWM)/Any custom recovery
- Wipe if coming from any other ROM
How to Install F1 GalaxyNexus on Samsung Galaxy S II
- Copy GAPPS and F1 GalaxyNexus to your internal SD Card
- Enter Recovery
- Do a Wipe/Factory Reset (OPTIONAL:If already on F1 GalaxyNexus skip this step but it’s always recommended to Wipe your device)
- Flash F1 GalaxyNexus ROM
- Flash GAPPS
- Reboot your device!
- Voila!
Known Issues
- Same CM Known Issues (Teamhacksung List)
- Found one ? Comment below.
Source and support forum: F1 Galaxy Nexus XDA Thread