How to Unroot/Recover a bricked AT&T Samsung Galaxy S 2

[Obi]

In case any of you are returning your ATTSGIIs, and want it back to stock. Or If you brick your sh$t, like i did the other day, and need to recover. It's a very simple process to get back to stock.
*Before starting, be sure you have the necessary drivers installed. Install [Only registered users can view links. ] if you don't have them.

1) Download [Only registered users can view links. ] (odin+unroot).

2) Extract the Unroot zip.

3) Plug in your device to your PC via USB, and hold volume up+down+power till your device goes into download mode.

4) Run Odin. Click PDA and select the unroot file you previously extracted.

5) Click the start button and let it do its thing. This process may take a few minutes. Be patient and let it boot back up.

6) Done. Simple, right?

Source: [Only registered users can view links. ]

[Mr.Gadget]

Here's what I get:



But... my Kies does not connect either...

Had to disconnect phone and now shows "Firware upgrade encountered an issue. Please select recovery mode in Kies & try again."
I am plugging it in and retrying the Odin...

Edit: Now shows Pass! OK, rebooting and looks good so far...!
OK... booted up!

You know, the other thing I did this time was to remove my 16GB RiData MicroSDHC card... (for what its worth).

[oochadoo]

works great, Thanks!!!!

[LucasBrown87]

I'm getting the fail message too and mine doesn't work when I unplug it and try again. What should I do? It looks like my phone won't even go into download mode. When I hold down the volume buttons and power button, I get the normal screen to press up for download mode and down to reset. But when I press up I get the same "firmware upgrade...." screen. I have the S2 Skyrocket, if that makes a diffference.

[Obi]

I'm not sure about that device. Figured it would be the same. You have USB plugged in while doing this, right?

[LucasBrown87]

yeah, USB is plugged in. I can get to the screen that gives you the option to press volume up for download mode, or volume down to cancel. No matter which one I pick though I get the same "firmware upgrade encountered an issue" screen. My computer is recognizing the device when I plug it in i.e. new hardware found comes up on my task bar, but Kies won't connect to my phone.

[LucasBrown87]

After freaking out for the past 24 hours, my phone is finally back to normal/unrooted. In case anyone else is having the same problem, the ROM that I used is located here: [Only registered users can view links. ]

[jjb70]

I've done this multiple times with no success. When I click start, it only takes about 10 seconds and then reboots phone and is still rooted. i've removed sim and micro sd, rebooted computer many times with no success. I've done this before on other phone with no problems.
Any help would be appreciated.

[Dy-nasty01]

Does this have the proper baseband file also? I rooted/ then unrooted and now my phone calls don't work. I can't hear them and they can't hear me.

[jonathanhatch88]

I still have SU. Is that normal?