Even with the official Ice Cream Sandwich (ICS) update rolling out for the Galaxy S2, it seems that the custom development department doesn’t want to stop releasing custom ROMs. An interesting ROM that stemmed from the official Ice Cream Sandwich update comes from XDA Developers member raffael88. Known as FoxHound PsychoMantis V2, the ROM is targeted for performance with features that boost the Galaxy S2’s shortcomings.

FoxHound PsychoMantis is based upon ICS software build XWLP7 from Samsung, with the developer repacking the ROM and adding some major enhancements. Tons of extra features were included such as a customization option for users to easily personalize their phone, a stock AOSP look and an inbuilt performance mod that lets users tweak the bare essentials of their phone’s internal configurations.

Check out the guide below for the full step-by-step instructions on flashing the FoxHound PsychoMantis ROM on your Galaxy S2.

Warning

• The instructions in this guide are intended for use with the AT&T Samsung Galaxy S2, model number SGH-I777.  Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only.  There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk.  We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.

Requirements

• AT&T Samsung Galaxy S2 SGH-I777 with ClockworkMod Recovery installed.
  • Consult our guide on how to root the AT&T Samsung Galaxy S2 SGH-I777 and install ClockworkMod Recovery.
• Backup of your personal files and important data.
  • You can read our guides on how to backup your data locally and how to backup your data to the cloud.
• Fully charged battery or at least 70% battery left.
• FoxHound PsychoMantis 2 ROM (FoxHound_PsychoMantis_V2_XWLP7_ICS_GSII_AT&T_By_SnakeS.zip, 261 MB)

Instructions

1. Download the latest version of the FoxHound PsychoMantis 2 ROM and save it to your PC.
2. Plug your Galaxy S2 to your computer via the pre-bundled USB cable.
3. Copy the downloaded ZIP file to the root of your phone’s internal SD card.
4. Safely disconnect your phone from your PC.
5. Switch off your phone.
6. Boot into ClockworkMod Recovery. You can do this by pressing and holding down the Volume Up, Volume Down, and the Power buttons. Keep pressing the buttons until the recovery menu appears.
7. Inside ClockworkMod Recovery perform a wipe:
   • Select Wipe Data/ Factory Reset, then select Yes on the screen that follows to confirm factory reset.
   • Select Wipe Cache then select Yes on the screen that follows to confirm wiping your phone’s cache.
   • Select Advanced > Wipe Dalvik Cache then select Yes on the screen that follows.
   • Select Mounts and Storage, then choose Format System. Select Yes on the screen that follows to confirm formatting your phone’s system.
8. Head back to the main recovery menu by selecting Go Back.
9. Select Install ZIP from SD Card.
10. Select Choose ZIP from SD Card then browse for the downloaded ROM and select it. Confirm the installation by selecting Yes on the screen that follows to begin flashing the ROM on your phone. It may take 5-10 minutes for the installation process to be completed.
11. Head back to the main recovery menu by selecting Go Back.
12. Select Reboot System Now to reboot your phone.

Congratulations! You have successfully installed on your AT&T Samsung Galaxy S2 SGH-I777 the Foxhound PsychoMantis 2 custom ROM based on Android 4.0.3 Ice Cream Sandwich firmware version XWLP7.