With how many minds are constantly at work in the XDA Developers forums, Android phones are always getting something new. The AT&T Infuse 4G SGH-I997 is certainly getting a different flavor of Ice Cream Sandwich, thanks to senior member mg2195. Introducing the Infinitum LBR custom ROM based on the Android Open Kang Project (AOKP), a port of the ROM for the Samsung Galaxy S GT-I9000 of the same name. This means it's a much sleeker AOKP ROM, based on our ever favorite Android 4.0.4 Ice Cream Sandwich and packed with performance and customization options.

You can enjoy a huge RAM patch, Windows Phone 7 font, increased call volume for those calls you don't want to miss a word of, stock theme with some visual mods and a modded market that works even after changing DPI.

But, like all ROMs in development, there are also some bugs. Anything that didn't work in Entropy's CyanogenMod 9 May 2, 2012 build doesn't work in this ROM, as well, and any Galaxy S settings, naturally, do not work on the Infuse 4G. These issues may be resolved in future updates so keep your eyes peeled.

The ROM, however, is okay for daily use. If those bugs don't discourage you and you're itching to get this ROM on your AT&T Infuse 4G, keep reading for our step-by-step installation guide.

This guide shows you how to upgrade the Infuse 4G I997 to Android 4.0.4 ICS via Infinitum custom ROM.

Disclaimer

• The instructions in this guide are intended for use with the AT&T Infuse 4G, model number SGH-I997. 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.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• AT&T Samsung Infuse 4G SGH-I997 with ClockworkMod Recovery installed
  • See our guide on how to root the Samsung Infuse 4G and install ClockworkMod Recovery.
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.
• Download the Infinitum 1.1.1 ROM package (INFINITUM-v1.1.1.zip, md5sum: 5048ed8079282db602aec39ee1f2583f) from any of the following links:
  • Mirror 1
  • Mirror 2

Instructions

On Ice Cream Sandwich ROM

NOTE: Use these instructions if your phone is currently running on an ICS ROM.

1. Copy the Infinitum ROM package file to the root of your Infuse 4G's SD card.
2. Turn off your Infuse 4G.
3. Boot into ClockworkMod Recovery, as follows: press and hold the Volume Up, Volume Down, and Power buttons together until the Samsung logo appears. Continue holding the Volume buttons until the recovery screen appears. Release the buttons.
4. Make a Nandroid backup of your existing ROM. Select Backup and Restore > Backup.
5. Select Mount System.
6. Perform a full wipe:
   • Select Wipe Data/Factory Reset.
   • Select Wipe Cache.
   • Select Wipe Dalvik Cache.
7. Select Install ZIP from SD Card > Choose ZIP from SD Card and choose the Infinitum AOKP ROM.
8. The phone should reboot into Recovery during the installation process. If it gets stuck at the Samsung logo, do the following:
   • Remove the Infuse 4G's battery.
   • Re-insert the battery.
   • Enter Recovery again.
   • Repeat from step 3.
9. After installation is complete, select Go Back.
10. Select Reboot System Now.

On Gingerbread ROM

NOTE: Use these instructions if your phone is currently running on a Gingerbread ROM.

1. Copy the ROM to the root of your Infuse 4G's SD card.
2. Turn off your Infuse 4G.
3. Boot into ClockworkMod Recovery. Press and hold the Volume Up, Volume Down, and Power buttons together until the Samsung logo appears. Continue holding the Volume buttons until the Recovery screen appears. Release the buttons.
4. Create a Nandroid backup of your existing ROM. Select Backup and Restore > Backup.
5. Perform a full wipe:
   • Select Wipe Data/Factory Reset.
   • Select Wipe Cache.
   • Select Wipe Dalvik Cache.
6. Select Install ZIP from SD Card > Choose ZIP from SD Card and choose the Infinitum AOKP ROM.
7. The phone should reboot into Recovery during the installation process. If it gets stuck at the Samsung logo, do the following:
   • Remove the Infuse 4G's battery.
   • Re-insert the battery.
   • Enter Recovery again.
   • Repeat from step 3.
8. After installation is complete, select Go Back.
9. Select Reboot System Now.
10. During boot-up, it may get stuck at the Samsung logo.
11. Boot again into Recovery.
12. Select Mount System.
13. Select Install ZIP from SD Card > Choose ZIP from SD Card and choose the Infinitum AOKP ROM.
14. Select Go Back.
15. Select Reboot System Now.

Congratulations! You now have the Infinitum AOKP ROM on your AT&T Infuse 4G.