How To Upgrade Your Samsung Infuse To Gingerbread  
(I am not that technical, and I did it...but it wasn't easy)
                    ** I am not responsible if you brick your phone doing this. Take your chances, but you probably won't and now there is even "unbrick" software floating around that might help you if you do**

This article will attempt to tell you what you need to do to upgrade your Samsung Infuse by AT&T phone (by hacking/jailbreaking it)

If you're as tired as I am of waiting for AT&T to finally upgrade you to Gingerbread, you can take heart in the fact that you can do it yourself and take control of your phone. Its not that easy, but perserverance makes it possible (and you'll probably need about $10 worth of software, even though it is actually "free" to do it). I am not sure why it has taken AT&T this long to finally come out with their upgrade, but since they've been saying it will be out for months now, I gave up.

There is quite a bit of help and information on the web for flashing roms and upgrade to various levels of Android software...but I found it to be kind of a forest. It took me about a week to finally figure out all the information that is below. Hopefully this will help you. I am sure its not perfect, but it will probably make some things more clear so you can find your way.

Things you're going to need-

ROM Manager (from Android Market)
SuperOneClick
Modified 3e Rom for the Infuse
RootExplorer (Paid software from Android Market)
Titanium Backup (Paid Software from Android Market)
A Gingerbread Rom (I'm going to talk only about the Cyanogenmod Rom) and probably the Google Software Rom.
Google Apps Rom (A seperate Rom that contains things you'll want like GMAIL and Android Market)

Get Titanium backup and install/backup your phone. That's for your protection and will make it easier to recover after you upgrade your ROM. One thing you should realize is that your going to loose all the contacts, apps, settings on your phone if you upgrade and don't have backups. As far as contacts, if you're using gmail, just make sure you go into the settings and turn on sync contacts so that they'll be backed up in the cloud. There is also an option in the contacts app that lets you back up all of your contacts to your SD card. That's handy too. Also, worst case scenario is that you need to download/reinstall all of your apps from the Android Market/Amazon Android App Store, and for the sake of a clean start, you might want to do that, but if you backup and then restore, you'll have everything back.

1) You'll need to get root access to your phone (just doing this step will give you much better control over your phone and is worthwhile). To do this you're going to need this SuperOneClick software--it makes it pretty easy to do it. Just download the software to your computer, turn on USB debugging on your phone (its in the menu) and hook your phone up to the USB port. After your computer recognizes the phone, you select the right kind of exploit from a dropdown and then click a button and the software does the rest. (more below) I used the psnueter exploit...the other ones didn't seem to work. Once you get root access you'll notice you have an extra "Superuser" icon in your apps list. Run it and look around--kind of cool for instance you can delete AT&Ts extra apps by "freezing" them.

2) You'll need to install a "modded" 3e recovery. This is a little bit tricky, but not too bad. First of all thoough, you'll need RootExplorer software. If you skip this step, you'll get an error message about your software not being signed when you go to flash the ROM. "e:signature verification failed" or something like that. When you install this modified recovery file, it will ignore the signature and install anyway. The reason you need rootExplorer software is because it will let you go into the android system folders (in this case, namely system/bin) and change the file out and then reset the permissions on the file. I know that sounds complicated, but there is a video about how to do it:

 3) You'll need ROM Manager to install ClockWork Mod Recovery. Its an app you'll download from the Android Market. Get the app, install it, run it and then you'll see the first thing in the list is to install ClockWork Mod Recovery. Click that button and reboot as instructed. You'll need to use your volume key down to select "reinstall Rom" If you didn't do step 2, it won't really work.

4) You'll need to download an Android Gingerbread ROM to use (one that is compatible with the Samsung Infuse!). Again, I recommend CyanogenMod 7 for Samsung Infuse. There are plenty of other choices though. Only thing about CyanogenMod is that it doesn't install the google software (including things like Android Market that you're probably going to want). You'll download and install that seperately. Download the ROM (the download is linked from the first message at the top of the thread I am linking you too here--you can click for a directory of the builds and get the one with the newest date or just take the main one that's linked), the file is about 98 megs. Rename the file "update.zip" and put it on your SD card. Use your ROM Manager to choose to install from the SD Card, and then reboot. Click on Reinstall Rom by using your volume down key and then click the power button to make it "go"...

5) You will get to the Samsung Screen and it will freeze there. Don't panic. Go back to the ROM install screen and choose REINSTALL again. Reboot, take the battery out and it should work the next time. You should then get your Infuse to boot up and you'll see the Cyanogenmod 7 splash screen...and your phone will come up. You'll notice alot of cool stuff, and alot of things missing. Again, one of the missing things you'll probably want is the "Google Apps"--you can download those as a ROM. You might also want to go to SWYPE.com and get onto the SWYPE beta so you can have SWYPE back on your phone.

If you do brick your phone (and you've pulled the battery out and reinstalled a couple of times, search for unbrick my android phone. You may also get help by using the Odin software.