Recovering an ATT Galaxy S2 after flashing GT-I9100 Firmware

[StoneyJSG]

I think you can boot i9100 roms on the sgh-i777 without issues if you use jeebo kernel. I am using that kernel with Android 4.1.2 stock rom and everything works fine, even the button mapping. My model number in settings says gt-i9100. I think you can also use shift kernel for booting i9100 roms, but I haven't tried it.

 

[Godfather379]

I've spent the last 2 days trying to fix my mistake. I have the GS2 ATT version, and I didn't realise there was a difference between that and the GTI9100 S2.

I wanted to give some tips I learned on how to recover your phone if you make this mistake.

First, here are some posts you'll want to look at:
http://forum.xda-developers.com/showthread.php?t=1286432 - Stock firwmware
http://forum.xda-developers.com/showthread.php?t=1285823 - Clockworkmod for the ATT
http://forum.xda-developers.com/showthread.php?t=1286192 - Cyanogenmod for our phones.

Using Odin and the stock firmware, you can recover your phone to a 95% working state. Once I got my stock firmware on there, I found that while making calls my phone made no sound, and the mic didn't work. The mic did work when I wasn't making calls though.

I reflashed the modem.bin file found on the stock firmware, not sure if its required but that is what I did first. Then, I unpacked the rooted stock firmware, and flashed JUST THE zImage file. After doing this, I rebooted, and my calls were working again.

After that, I installed the correct version of Clockworkmod, and then CM7 nightly. Now everything seems to be running great on my phone.

Hope this helps someone out there,
-Orbital

So whoa..... This method can actually unbrick a bricked phone that phone even start? Wish I had known when I had a 3d phone. Would've loved to have been able to keep it. But my phone I accidentally wiped the system off of it. So when I go to reboot from recovery it says no os to reboot too, are you sure you want too reboot. Will this fix that?

 

[meantomatoes]

Can you please make an unbrick image with your i777? Trying to recover from a hard brick.

EDIT: problem semi-solved in another thread.

 

[Tmobilefan906]

So whoa..... This method can actually unbrick a bricked phone that phone even start? Wish I had known when I had a 3d phone. Would've loved to have been able to keep it. But my phone I accidentally wiped the system off of it. So when I go to reboot from recovery it says no os to reboot too, are you sure you want too reboot. Will this fix that?

Just flash stock firmware