[AT&T Samsung Galaxy S II Skyrocket SGH-I727] hitekredneck:
OK, here are a couple of links. One is to a tutorial here on XDA that will walk you through using Odin to flash stock ICS firmware from AT&T.

But first, here is the link to download the firmware (ROM) that you will need -> http://www.hotfile.com/dl/162779401/27c699c/I727UCLF6_I727ATTLF6_ATT.zip.html. Just choose "Regular Download" from the page that shows up. I know this is a very large download and will take quite some time to download from Hotfile servers.

And here is the link to download Odin, the program that you will use to flash the stock firmware to the phone. -> http://xdaforums.com/attachment.php?attachmentid=925569&d=1330549534

Download both of these packages to your computer, not your phone. And be sure you have an archive extracting program such as 7zip installed on your computer. It is free software and you can download the 32bit or 64bit version, whichever you need, from the following link. -> http://www.7-zip.org/.

Next, here is the link to the tutorial for flashing this firmware with Odin -> http://xdaforums.com/showthread.php?t=1652398

Scroll down until you find section #1 that is titled "1. HOW TO RESTORE STOCK FIRMWARES".

Follow the instructions to the letter, other than the file downloads, as those I have previously provided above in this post. I am assuming that you have already downloaded these prior to implementing the following tutorial. Once you have gone through this procedure and you have a fully functional Skyrocket, please hit the thanks button for Vincom as he is the one that took the time to work up this tutorial for anyone that may need it.

Happy flashing ..... HTR

The following is only copy/pasted from the tutorial link above. Please use the instructions from that thread only. I only posted an example below so you would know where to start in that thread.

DO NOT! CHECK "REPARTITION" IN ODIN! YOU HAVE BEEN WARNED!!

1. Download Odin 1.85

2. Download the stock TAR for your device - see section below.

3. Extract(with 7-ZIP) the contents of odin-185.zip to a folder.

4. Extract(with 7-ZIP) the contents of the stock firmware file to a folder, do not change the name of the extracted MD5 file.

5. Run Odin 1.85.exe from the folder you extracted it to.

6. Prepare Odin: Check "auto-reboot" and UNCHECK ALL OTHER OPTIONS.

7. Only Click "PDA" and select the firmware file you extracted, it will have a md5 extension.

8. How To Put your device into Download Mode: (download mode is NOT the same as recovery mode)

a. Connect the USB cable to your PC, but NOT your device.

b. Remove the battery.

c. Reinsert the battery.

d. Press and keep down both Volume Up and Volume Down keys then insert the USB cable into your device. (On Rogers phones It's just Vol Down.) DO NOT RELEASE THE VOLUME BUTTONS UNTIL INSTRUCTED

e. When You see the screen warning you about installing a rom w/a yellow triangle RELEASE the volume key(s)

f. Now press and release the volume "up" key, you should now be at the Download Mode screen w/odin recognising your phone. -See Pics Below-.

9. Click Start in Odin, it will flash the firmware, give it approx. 10mins. When its done flashing it will autoreboot the phone. Thats it, you're done.