This is a package to return your Infuse 4G to a complete stock state with the AT&T UCLB3 Gingerbread release. It includes a PIT file to repartition your phone. Also, this resets the Custom Binary Download counter. Consider this a way to put the phone back to stock or to recover from a soft-brick without going all the way back to Froyo.
There is both a complete stock version and a rooted version below.
Stock UCLB3 with root
The version with root works exactly like the above version, but adds root. To add CWM recovery to the rooted version, download a custom Gingerbread kernel from HERE or HERE and flash the zImage using SGS Kernel Flasher (found in the Play Store) on the phone. If you go this route for root and CWM, your Custom Binary Download counter will not show any custom binary activity.
1.) Download and extract the zip package.
2.) Place phone in download mode.
3.) If needed, install latest Samsung USB drivers by installing Samsung Kies from HERE.
4.) Open the included Odin exe.
5.) If phone is detected, the window under ID:COM will turn yellow.
6.) Click on "PIT" to browse to and select infuse_gb.pit. Make sure that Re-Partition is selected.
7.) Click on "PDA" to browse to and select PDA_UCLB3.tar.md5.
8.) Click on "PHONE" to browse to and select PHONE_UCLB3.tar.md5.
9.) Click on "Start", and allow Odin to flash the phone. Do not unplug or power off the phone until Odin is finished.
10.) When the Odin dialogue reads "PASS!", the phone should reboot into the stock UCLB3 Setup Wizard.
1.) Should I do a software Factory Reset in settings after flashing this?
In the case that the Setup Wizard does not appear on the first boot, apps from a previous installation are still present, or you have other issues, go to Settings / Privacy and choose "Factory data reset" and then "Reset phone". This will ensure that the phone is completely reset, and that there is nothing left-over from a previous install to cause issues.
2.) I have rainbow distortion in recovery or in the boot animation. How can I get Gingerbread bootloaders to fix this?:
If you have rainbow distortion, you still have Froyo bootloaders. You can download THIS .rar file, extract using 7zip, and flash the tar.md5 package in Odin (use the pda slot). Flashing Gingerbread bootloaders will correct rainbow distortion in recovery and in the boot animation. Only flash these if you are having issues with rainbow distortion, and only if you have had success flashing other, less dangerous items in Odin.
3.) Does this package remove anything from the internal or external sdcard partitions?
This package does not remove anything from your internal or external sdcard partitions, so all of your user files stay on the phone. If you are using this to reset your phone to stock before selling it, etc., you should format personal storage by using options found under Settings / SD card and phone storage.
gtg465x for earlier unbrick packages and posts on using dd
imnuts for posts on how to create Odin images
Przekret for the Samsung UCLB3 leak
Everyone in the Infuse 4g XDA forum - for everything else