[Sony Xperia S, Acro S, Ion] RPieter:
Helllo all,

After looking and trying for a long time I give up and scream here for help. I have a Sony Xperia S LT26i and want to upgrade it from 6.1.A.2.55 (4.0.4 Ice Cream Sandwish) to 6.2.B.0.200 (4.1.2 Jelly Bean). This is not working for me.

First I tried with PC Companion. I connect my phone to the PC via USB-cable, I hit update and Accept, after that it starts preparing the PC, than says Checking the PC. At the same time PC Companion puts off the phone, restarts it (at the same time Windows (64bit) tells me that the connected device cannot be recognized. After this the phone goes down again. After this PC Companion comes to the window where it says to unplug the usb-port, making sure the batt is more than 50%, that i should turn the phone off and wait 5 seconds, connect usb-cable again and then connect the phone holding down the volume-down button ===> so this I do exactly; BUT again Windows telling me it cannot recognize the device connected, and the PC Companion stays at the same screen doing nothing. At this moment the phone is just charging while turned off.

==> this did not work.

Second try --> I downloaded the Flashtool and the Firmware. Installed the Flashtool and after that put the downloaded firmware in the C:/Flashtool/firmwares folder on my drive. After this opened the Flashtool, in my case the 64bit version of the program, clicked the lightning button, selected Flashmode and pressed OK. After that a new window opens where I select the firmware at the left (I leave at the right DATA, CACHE and APPSLOG selected), click Flash and then connect my phone (phone is off, holding down the volume down button while connecting the usb cable to the phone) via usb-cable to the PC. Than Windows tells me again it cannot recognize the device AND at the same time the Flashtool tells me: Error flashing. Aborted. Here is the total LOG-file from Flashtool:

20/029/2013 21:29:39 - INFO - <- This level is successfully initialized

20/029/2013 21:29:39 - INFO - Flashtool Version 0.9.11.0 built on 2013-06-04 22:50:00

20/029/2013 21:29:44 - INFO - Device connected with USB debugging on

20/029/2013 21:29:46 - INFO - Connected device : Sony Xperia S

20/029/2013 21:29:46 - INFO - Installed version of busybox : N/A

20/029/2013 21:29:46 - INFO - Android version : 4.0.4 / kernel version : 3.0.8+1.0.21100-30145-01957-gc34b591 / Build number : 6.1.A.2.55

20/030/2013 21:30:48 - INFO - Device disconnected

20/031/2013 21:31:12 - INFO - Selected LT26i / 6.2.B.0.200 / WORLD

20/031/2013 21:31:12 - INFO - Preparing files for flashing

20/031/2013 21:31:18 - INFO - Please connect your device into flashmode.

20/031/2013 21:31:37 - INFO - Device connected with USB debugging on

20/031/2013 21:31:38 - INFO - Connected device : Sony Xperia S

20/031/2013 21:31:38 - INFO - Installed version of busybox : N/A

20/031/2013 21:31:38 - INFO - Android version : 4.0.4 / kernel version : 3.0.8+1.0.21100-30145-01957-gc34b591 / Build number : 6.1.A.2.55

20/031/2013 21:31:40 - INFO - Device disconnected

20/032/2013 21:32:33 - INFO - Device connected in flash mode

20/032/2013 21:32:33 - INFO - Opening device for R/W

20/032/2013 21:32:33 - INFO - Start Flashing

20/032/2013 21:32:33 - INFO - Processing loader

20/032/2013 21:32:33 - INFO - Checking header

20/032/2013 21:32:33 - INFO - Ending flash session

20/032/2013 21:32:33 - ERROR -

20/032/2013 21:32:33 - ERROR - Error flashing. Aborted

20/032/2013 21:32:34 - INFO - Device connected in flash mode

20/032/2013 21:32:44 - INFO - Device disconnected

20/032/2013 21:32:50 - INFO - Device connected with USB debugging off

20/032/2013 21:32:50 - INFO - For 2011 devices line, be sure you are not in MTP mode

I also looked into this not being in MTP mode, but it seems my phone does not has this choice,... I tried to look into Settings --> Xperia --> Connection,... but there was no option for MTP.

So please guys,... Who has some tips or ideas to solve this?

Thanks in advance :)