[WARNING] Samsung 4.0.4 firmwares (Official / Leaked) may lead to HARDBRICK

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To all of i9100 users having flashed the latest 4.0.4 firmware (Official / Leaked) with stock kernel, PLEASE BE AWARE that using cwm to erase data/factory reset OR to restore a nandroid backup MAY BRICK YOUR PHONE !!!! Trust me, I just got mine bricked and by searching a litlle bit I discovered I'm not the only one -> see here and here ... and the number is growing ...

Actually confirmed firmwares having the emmc bug :
XXLQ5/6/7/B - ZCLPL - XWLPM/O/T/U - MUGLD3‎(?)

Here's how to BRICK your phone :
-Flash the 4.0.4 firmware with/without its pit file
-Use any 4.0.4 based kernel - stock or modified (ex cf-root)
-Go to cwm and do a wipe data & wipe cache and/or perform a nandroid restore of any previous firmware
=> The process begins normally but it may/will switch off at any time without waking up ever again !!!!!

Symptoms of 4.0.4 HARDBRICK :
-Phone dead
-No power up
-No boot
-No download mode (odin mode)
-No charging (usb/ac)
-Not detectable by pc / jtag
-Usb jig & jtag useless
-With battery(charged) inserted, phone(off) gets hot near the camera lens
-JUST A PIECE OF PLASTIC !!!!
-You feel really stupid about trying all this new stuff

And now here's how to avoid 4.0.4 hardbrick :
-DO NOT flash any stock 4.0.4 firmware
-If on 4.0.4 stock firmware, keep away from stock kernel (ex: use siyah kernel or latest speedmod)
-Use "eMMC Brickbug Check" app to verify whether you have an insane ship or not
-Backup your apps (titanium backup) and backup all (cwm) and copy all data from internal sdcard
-DO NOT wipe any partition or data
-Flash any official 4.0.3 stock firmware in download mode via odin (do not use mobile odin)
-Do not get tempted again by any unsafe leaked or official firmware !!!

Downgrade from 4.0.4 :
-Reboot the phone in download mode (Home+Vol.Down+Power)
-Use Odin to flash a safe kernel (ex. siyah) then reboot to cwm (Home+Vol.Up+Power)
-Optionally do a nandroid backup then perform a data wipe/factory reset
-Use advanced menu in cwm to reboot in download mode to flash your preferred "safe" firmware

While waiting for someone to find a way to revive such bricked phones, I hope you guys take care of your precious S2, you only know its value when it's gone

Originally Posted by googy_anas

To all of i9100 users having flashed the leaked 4.0.4 firmware, PLEASE BE AWARE that using cwm to erase date/factory reset OR to restore a nandroid backup WILL BRICK YOUR PHONE !!!! Trust me, I just got mine bricked and by searching a litlle bit I discovered I'm not the only one -> see here and here

Let's just hope someone finds a way to revive such bricked phones

Thanks for the heads up mate!

I used nandroid to do a restore after messing with mods and it didn't brick.

Sent from my GT-I9100 using xda premium

So, is there any safe way to get LQ5 downgraded to LPG?

I have been running LQ5, but this has me a little worried.

---------- Post added at 06:34 PM ---------- Previous post was at 06:33 PM ----------

Originally Posted by drelite08

I used nandroid to do a restore after messing with mods and it didn't brick.

Sent from my GT-I9100 using xda premium

You were on LPQ and did a nandroid restore to LPG? (or what version was the restore?)

Originally Posted by donalgodon

So, is there any safe way to get LQ5 downgraded to LPG?

I have been running LQ5, but this has me a little worried.

---------- Post added at 06:34 PM ---------- Previous post was at 06:33 PM ----------



You were on LPQ and did a nandroid restore to LPG? (or what version was the restore?)

Flash it with Odin?

I'm on LQ5. It has both restored to LPS (new argo one) back up and a second back up I made before trying the mods. Both were fine. Using Phenom 5.5 medium.

Sent from my GT-I9100 using xda premium

So, is it the manual formatting of the partitions or the nandroid restore that causes this?

i flashed LQ5 4.0.4 with odin, tried it out for 20 mins, then flashed latest fluxi through odin, then restored CM9 backup. all good for me

I've run LQ5, full wiped, restored nand backups several times today without any problems, but maybe I was just lucky. Anyway, time to run Odin, apologize LPG and wait for official. Don't wanna risk the brick.

And here is nr3 who bricked his phone with 4.0.4LQ5 kernel.
It happens with both stock and CFkernel(=99%stock) LQ5...

http://forum.xda-developers.com/show...9#post28383119
(Read post 5836 and futher)