We have been getting emails all weekend asking for a tutorial on how to install the official Android 4.0 Ice Cream Sandwich update to the Xperia arc. We therefore thought we’d knock up a quick guide to take you through the process. As a quick recap, Sony Mobile announced the rollout of the ICS Xperia update on Friday 13 April, but only for three of the 2011 Xperia range (Xperia arc S, Xperia neo V and Xperia ray).
The original Xperia arc is not due to be updated until late May 2012. Fear not though as given the similarities between the Xperia arc and Xperia arc S, arc users can install the ICS update to their handset right now. The guide below takes you through what you need to do step-by-step.
Installing the official Android 4.0 ICS update to your Xperia arc
Disclaimer: You should note that once you complete the process, your phone will be recognised as the Xperia arc S (LT18i). Android 4.0 ICS will work as advertised, but you may encounter certain bugs or issues as the firmware was not designed specifically for the Xperia arc. Xperia Blog absolves itself from any responsibility should something go wrong. Please proceed with caution and at your own risk.
Note: This tutorial 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.
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 as seen in the picture below (‘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!
Thanks to xda-developers.
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