I flashed the ROM and it worked like a charm, with no errors while flashing or what so ever.
Xperia Arc S LT18i
BTW: This is my first flashing experience EVER! I'm a noob and never tried those thing before.. I just couldn't resist the temptation of ICS and could't wait any-more.
IT"S VERY EASY!
Here are the steps precisely (I followed the steps from http://www.xperiablog.net/2012/04/15...ria-arc-guide/
And they are as the following:
Downloaded the ROM from: (they are 2 parts)
Note: This whole thing does not require you to root your handset and it does not require you to unlock your bootloader.
1) Install drivers for the Xperia arc
The very first step is to make sure that your PC has all of the necessary drivers installed for the Sony Xperia arc. The best way to do this is to install PC Companion or Sony Ericsson Update Service (SEUS). Make sure you connect the Xperia arc to the PC before starting the process to download the necessary USB and ADB drivers. If you have any problems you will find the necessary drivers once you have installed Flashtool in the following location: ‘C:\Flashtool\drivers’.
2) Switch on USB debugging on your handset
Switch on the debugging option on your Xperia arc. Go to Menu –> Settings –> Applications –> Development –> Tick ‘USB debugging’
Also tick ‘Unknown sources’ under Menu –> Settings –> Applications
3) Install Flashtool 0.7.0.0
You must ensure you install Flashtool version 0.7.0.0 for this process to work. The older versions of Flashtool do not have the command to handle the new ICS partition resizes.
As the official Flashtool site is currently not allowing a download of the necessary file, you can download it from our mirror here. The zip package includes two files: 1) Flashtool 0.6.9.1 and 2) an update zip file.
a. Install the ‘flashtool-0.6.9.1-windows’ application.
b. Once complete, unzip the ‘update’ file. Move and replace all contents of the zip file to C:\Flashtool.
c. Once you have done this, launch Flashtool. The log window should show that you are using ‘Flashtool Version 0.7.0.0 built on 2012-04-14 11:34:01′. To make sure of this you can always go into Help > About to see what version you are using.
4) Download the Generic Nordic ICS Xperia arc S firmware
Download the Generic Nordic ICS Xperia arc S firmware from here
(377MB). This is firmware version 4.1.A.0.562 which will update your phone to Android 4.0.3.
OR, in case the download is slow, you can go from here (as described above):
A note of warning: Some browsers like Opera will rename the extension of this FTF file as a zip file when trying to download it. Make sure that the downloaded file has a .ftf extension rather than .zip.
5) Place firmware in correct location on your PC
Place the FTF file in the C:\Flashtool\firmwares folder.
6) Launch Flashtool
Open the Flashtool application on your PC. Click on the lightning bolt symbol. Select Flashmode and click OK.
7) Select firmware
Select the correct firmware in the left column (LT18_4.1.A.0.562_NCB). Check the boxes (‘Wipe User Data
’, ‘Wipe Cache
’ and ‘No Final Verification Check
’ all need to be ticked).
8 ) Connect Xperia arc to PC
Turn your phone off. Press and hold the back key while plugging the USB cable into your Xperia arc.
9) Flashing process will start
The flashing process should now start. Once you see the “Flashing finished” message in Flashtool, remove your handset from the PC and wait until the phone reboots (this may take some time so don’t panic).
10) Your Xperia arc should now be running ICS
Congratulations, your Sony Xperia arc should now be running Android 4.0 Ice Cream Sandwich!
That's it, guys!