[Galaxy S II Q&A, Help & Troubleshooting] mac.2013:
Hello, i'm a XDA noob and i have a Problem with my i9100.

I figuered out that i have a Soft Brick and thanks to the Guide i fixed that one.

The battery was full when i went sleeping. And half an hour ago everything seems to be fine. 95% battery, phone is working. I had flight mode activated and just deactivated it. I got an Error that the SMS app was closed, but everything was still fine. I locked the Screen, 5 minutes later i came back and it Soft Bricked again. (The first Soft Brick came from out of nowhere, too).

i Had the Original Samsung Stock 4.0.3 (the download from in the Guide) installed. It worked fine after Step 4.

Symptoms:

Does not boot

No Recovery

Download mode works if connected with USB

Loading works partially, the symbol apears, but after 9 seconds it disapears and after 6 seconds it apears again...

If i try to enter Download mode with low battery and no USB conection, i get a Screen warning that Battery is low

I Randomly get a Screen flicker which lasts about 0.1 - 0.5 seconds. The 0.5 ones show the Andorid logo who is installing something . I Think the 0.1 second ones show the same thing but i'm not sure.

Odin Flash works ! Here's the log

<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> I9100_APBOOT_I9100XXLPH_CL118559_REV02_user_low_ship.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> I9100_CODE_I9100XXLPH_CL118559_REV02_user_low_ship.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> MODEM_I9100XXLPH_REV_02_CL1104396.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> GT-I9100-MULTI-CSC-OXALPH.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/003> Added!!
<ID:0/003> Odin v.3 engine (ID:3)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> boot.bin
<ID:0/003> NAND Write Start!!
<ID:0/003> Sbl.bin
<ID:0/003> param.lfs
<ID:0/003> boot.bin
<ID:0/003> Sbl.bin
<ID:0/003> param.lfs
<ID:0/003> zImage
<ID:0/003> factoryfs.img
<ID:0/003> data.img
<ID:0/003> cache.img
<ID:0/003> hidden.img
<ID:0/003> modem.bin
<ID:0/003> Transmission Complete..
<ID:0/003> Now Writing.. Please wait about 2 minutes
<ID:0/003> Receive Response from boot-loader
<ID:0/003> cache.img
<ID:0/003> RQT_CLOSE !!
<ID:0/003> RES OK !!
<ID:0/003> Removed!!
<ID:0/003> Remain Port .... 0
<OSM> All threads completed. (succeed 1 / failed 0)

After Odin it wont boot directly nor Recovery works, but if i wait a few minutes and change battery ( i have 2 batterys ) multiple times, it somehow starts to show the same old "andoird is working" screen and then boots in a nice stock Android 4.0.3.

Additional Information

I had installed CM 10.1 (with CWM) before. And it worked fine for months.

Someday the battery usage became extrem (there is a Problem with the SD card, because it's always saying the SD was removed and installed, checking for errors, and that costs a lot of battery power...

I deleted all the data/data manually and some system folders --> Boot Loop , so i decided to swich back to Stock Android 4.2.2. That worked fine, Memory usage is high too if using with a SD card. But OS was stable, till yesterday...

I neither connected my phone with Google yesterday, nor did i sign up with Samsung services, nor did i changed anything, nor did i installed apps.

Now my Question is:

What should i do to get a stable system? Is there any option to get my phone back to factory status? (no i don't mean factory reset, because this only change a few folders but not all on the phone...)

Thank you.