Update Sony Xperia Arc S LT18i With Official ICS 4.0.4 Firmware

Its Was Great News To Hear That Sony is Rolling Out ICS Updates For 2011 Xperia Devices.They Have Rolled Out ICS 4.0.3 Updates For Xperia Ray, Xperia Arc S & Xperia Neo V Simultaneously.Now Its Time To Update Xperia Arc S With The Latest Version of Android viz, ICS 4.0.4.This Generic Firmware Update of ICS 4.0.4 is The Official Update Released By Sony For Xperia Arc S.Over The Period Of The Article We Will Checkout On How To Apply The ICS 4.0.4 In Your Arc S.

Let Us Go For The Remaining Portion of This Article Where We Will Be Checking The Following Things :

  1. Essential Steps Before Updating Firmware.
  2. Procedure To Update Sony Xperia Arc S LT18i With Official ICS 4.0.4.

update sony xperia lt18i with official ics 4 0 4 firmware0Disclaimer : We Have Made This Article Covering Each And Every Part At Our Level Best.In Case If Any Damage Happens to Your Device (It Should not Be), Neither We nor Sony will Be Held Responsible For It.And Also Please Be Noted That Flashing Firmware May Void Your Device’s Warranty.So Flash It At Your Own Risk.

Essential Steps Before Updating Firmware:

  • You Must Enable USB Debugging By Checking the Box in your device by Following the Path Below:

Settings -> Applications -> Development -> USB Debugging

  • It will highly Recommended to Backup all Your data Stored in your phone So as to Restore it back just in case If You Lose or Corrupt the Data During this Process.
  • Your Device Must be Charged up to 70% or Above Battery Level to Ensure that Your Device should not be Turned Off During this Process.
  • It will be Recommended to Temporary Disable Security Tools as well as Antivirus Installed on your Computer as This might Interrupt the Process.

By Assuming that you have followed all the instructions mentioned in Essential Steps Before Updating Firmware, You are Now Ready to Move to Rest Part of The Article Where We Will be Checking That how to apply ICS 4.0.4 Firmware Update in Xperia Arc S.

Procedure To Update Sony Xperia Arc S LT18i With Official ICS 4.0.4 :

  • Firstly You Need To Download The Two Files Which is Mentioned Below :
  1. Xperia Flashtool.
  2. Xperia Arc S ICS 4.0.4 Firmware Package. | 374 MB
  • Install Flashtool Which You’ve Just Downloaded In Your Computer (For You Convenience, It is Recommended To Install Flash Tool in C: Drive).
  • Extract Xperia Arc S ICS 4.0.4 Firmware Update Package (LT18i_4.1.B.0.431_Generic.World.1254-2184.7z) in Your PC, You’ll Get .ftf File.
  • Navigate C:–>flashtool–>firmwares Directory.Delete All The Data in That Directory If It is Present Over There.
  • Copy/Move The Extracted Firmware Package File (.ftf File) In The C:–>flashtool—>firmwares Directory.
  • Now We’ll Proceed To The Actual Firmware Updating Procedure In Our Further Tutorial.
  • Open Xperia Flashtool Which You’ve Just Installed.Select Flash Option From The Top Corner of The Tool.(Refer The Image Below).

update sony xperia lt18i with official ics 4 0 4 firmware1

  • You’ll Be Ask To Select Either Flash Mode Or Fastboot Mode.Select Flash Mode & Press Ok.

update sony xperia lt18i with official ics 4 0 4 firmware2

  • After Selecting Flash Mode, Firmware Selection Window Will Appear.In The Left Side Select LT18i (Version 4.1.B.0.431).
  • In The Right Side, Tick The Following 4 Options Only.
  1. Wipe data
  2. Wipe cache
  3. Wipe apps log
  4. No Final Verification

update sony xperia lt18i with official ics 4 0 4 firmware3

  • Press Ok Button. Wait For It To Prepare.Now It will Ask You To Connect Your Mobile, Follow The Steps Carefully & Connect Your Phone.(While Connecting The Device To The Computer, Turn Off Your Xperia Arc S. Press & Hold The Back Key.Now Connect It To The PC).
  • As Soon As Connect Your Device To PC, Flashing Process Should Now Start.Once You See The Flashing Finished Message In Flashtool.Remove/Detach The Device From PC & Wait For The Device To Reboot (First Boot After Flashing Firmware Takes More Time Than The Usual.So Don’t Panic & Be Patient).

Congratulations ! By This Time Your Sony Xperia Arc S Should be Running On Latest Firmware Update of ICS 4.0.4.Now In Case If You Face Any Difficulty While Flashing The Firmware, Do Let me Know In Comments.I Will Be There To Assist You As Quick As Possible.

The following two tabs change content below.

Viraj Kshatriya

Hello everyone, I'm Viraj, the chief editor at Android Legend. When I'm not checking out the latest stuff happening in Android, I mostly spend my time flashing different ROMs, testing Android apps & games. Feel free to join me on Google+.
  • Zarak Jamal

    can we remove micro sd card ( memory card) from the phone before attaching the phone to the computer for update ???

    • Viraj SK


  • John Pip

    Hi Viraj, you are an ace.This worked perfectly thanks to your excellent instructions. The trouble is, my Xperia arc s wifi tethering would no longer work, and as I use this all the time for my ipad it is a big problem for me. By the way, this had always previously worked perfectly.
    I have searched everywhere on the internet for a solution, with no luck. I am therefore reluctantly downgrading again until Sony has resolved this issue, using the same instructions!

    Regards, JP

  • Paul

    I was a little scepticle about the benefits of 4.0.4 over 4.0.3 so I did this on a friends handset first – and wow… he can now faceblog twice as fast as me. Think I’ll wait until Sony release a version for my LT18i before committing. (Although did I miss anything and 4.0.4 offers any other benefits I’ve not found?)

  • Mukesh jain

    Sir in my sony xperia lt18i I have network prob. Can it b solved by updating? Now its running on 2.3.4 ver. Pls reply as soon as possible.

  • Alak

    I am not able to do this. The link(download) file name is LT18i_4.1.B.0.587_Generic Global World.ftf. but the mentioned (in instruction) file name is LT18i_4.1.B.0.431_Generic.World.1254-2184.7z. both are not similar. maybe this makes problem. I got a link with same file name as instruction, but size is not same. Can I try with this one: http://server1.android-rom.ir/firmware/index.php?dir=sony/LT18/&file=LT18i_4.1.B.0.431_Generic.World.1254-2184.7z

  • Adhi

    I follow your instruction but forgotten USB debugging.
    Flashing completed. I turned on and display remain stuck in “XPERIA”.
    What should I do? plz help

  • driss

    Hi Viraj,

    I have flased my sony xperia arc s lt18i before with your instructions and is unlocked and the bootloader is unlocked but it crashed and it gets unrooted. I unlocked it now and when i try to flash it i get error 31, flash aborted or “MAJOR”;ERR_CLASS=”MEMORY_CLASS”;ERR_STATIC=”HASH_VER”;ERR_DYNAMIC=”Failed to erase!”;
    I dont know if i must do the process from the begining or what???? i mean if i need to root it ??? it shows that is rooted.

    Plz help

    • Viraj SK

      Re-lock the bootloader and then try to flash the firmware. Hope it helps…

      • driss

        Hi ViRAJ,

        i get the same error everytime i try to flash a firmware. all working in the phone. if i put room in sd and flash the kernel on fastboot works but get bootloop and stuck on bootanimation.
        i m crazy, plzzzzzz help
        best regards

        • Viraj SK

          Flash the kernel, boot into recovery, wipe data, flash ROM, again wipe the data. It should work…

      • Driss

        Hi Viraj,
        How are u ? :) Finally i updated my sony xperia Lt18i with SEUS and it shows that my phone is updated with the latest update. OK, now what i gone do ?
        It stuck on sony logo and bootloop. Give please instructions to start use my phone like before.
        Best regards Viraj

        • Viraj SK

          Did you try with the above method?

  • meedo

    I couldn’t find any LT18i 4.0.4 firmware package the link is invalid.

  • Troy

    I can’t download Xperia Arc S ICS 4.0.4 Firmware Package. How can I do? Please help me!!!

    • Viraj SK

      Link is given in the article. Please check…

      • Troy

        I mean I can’t download the ICS 4.0.4. From where you provide. It is not working.

  • Shaweiz Khan

    Awesome work dude. Hats Off To you. i was about to change my phone just because it is based on gingerbread (old) ! But wasnt willing to sell because it is my first android phone.. you gave a life to my phone. Thank you So MUCH sir !

  • Ashwin

    The link is dead,.!!
    Pls provide anothr

    • Shreyas

      Link updated

  • avi

    how to fix the GSM network problem????? am from India, kolkata

  • suraj ismail

    how n what will happen to rooted XPERIA arc s , is it only increasing the version or something else will be added to the phone….. n what is that?, ….will the storage increase ?, will the network change to 4g?, will the Rom n RAM increase?, how will the phone behave.please help me … thanks



  • Moamen samak

    My phone gives me a caution sign and a phone after it when i reboot and i tried these steps it doesnt work please help

  • Abdulrahman

    Play store

  • Nasir

    Great work bros. Work like chap

  • Haroon

    Hi Viraj,
    I have tired to upgrade my mobile form ICS to JB. Unfortunately it didnt boot after following all the steps. Now it has dropped to gingerbread again. Now i am not even able to upgrade it to ICS using flash tool. Could you please help me on this. I would like to upgrade my mobile to JB. And also please let me know is there any flaw if i do that??

    • Moamen samak

      I have this problem on my phone it is still not booting so did this way work ? … and if your phone did boot and you want the ics update update it via sony pc companion mmuch easier

  • Maen

    I’ve removed my system apps by moving them to sd card when i rooted my arc s with ICS 4.0.4 and i rebbot it then the phone gives me a caution sign with a phone under it

    so if i make these steps of update can it fix my problem , flashing mode is enough for solve the problem
    please i need help with this problem .

    • Maen

      i’ve tried it and everything is solved precisely :)
      Im very happy at the moment :)

  • George

    Works perfect! Greetings from Colombia.

  • Thomas

    Hi ,
    My phone is Sony Xperia Arc Lt 15i , and it is rooted , can i ask you how to update my phone .
    With regards …

    • Viraj SK

      Which Android version you want to update with?

      • Thomas

        My android version is 4.0.4 . I got a notification to update 4.1.D.0.587. Thank you for reply .

        • Viraj SK

          Go with it. It’s a latest one. But you’ll lose the root access after upgrading…

  • karzan

    Hello, I have wifi connection problem with my Sony Xperia arc s.
    When I connected to the internet, it shows me ‘authentication problem’
    But my laptop can access with the same internet connection.
    I can connected to the public open network, but can’t with my own house connection.
    I would like to ask what’s the problem? Do I need to reset anything or what?
    Hope to get your reply as soon as possible. Thanks!

    • Viraj SK

      Which security have you set for the Hotspot?

  • Raheel

    Whoha !!
    Done dude.
    Upgraded to ICS & That auto power off fault gone away.
    This is Awesome work you did. You solved my Problem.
    Humanity has no boundaries.
    Really thanks to yOu Man.

  • st

    doesn’t work asking for drivers that are NOT in the drivers folder as there is no drivers folder!!

  • Raheel

    Dear Viraj, I have Arc S & its Gingerbread. the only problem to it is auto switch off.
    If i dont don’t use it for 2-3 hr or further like night, it goes off. have you any solution for it bro ?

    • Viraj SK

      Did you flash any custom kernel or something like that?

      • visualshock

        cant download the Xperia Arc S ICS 4.0.4 Firmware Package.Xperia Arc S ICS 4.0.4 Firmware Package.

      • Raheel

        No Never.
        & i m downloading ur files on PC , & its saying it malicious. .

  • Afzal Ahmed

    i have sony xperia arc s, but in this android version 2.3.4 (gingerbread) and build number is 4.0.2.A.0.62 and i want to jelly bean 4.2, so, what can do for this? plz help me.

  • Simon

    Can you explain how to do this on a Mac?

  • http://www.voipshop.ba Mario

    Everything works perfectly
    Thanks a Lot :):)

  • Dave

    Worked perfectly thank you brother!

  • Hilla

    My sonyerisson LT18i is not powering on after I updated it. I did the update using the phone now if I power it on nothing comes on the screen can anyone help……

  • JR

    Hi Viraj,

    I get error message on the flashtool when I connect the device to the pc.

    Pls help asap.

    • Vlad

      Me too i don’t know what i supose to do, please help us

  • Marcus

    Thank you. I followed the instructions and managed to update my arc succesfully.

  • JJ

    Hi does this update really work?? because my Arc S hs the version 2.3.4 I think?

  • Utsav

    Hey bro i rooted my phone xperia arc s lt18i 4.1.b.0.587.. and did the factory reset and now Camera and home button doesnt work so i was thinking updating to this firmware(4.0.4) might help fix the problem? plz tell me this process brings the old ROM back and fixes the bugs in my phone. reply plz…

  • https://www.facebook.com/antiseptic.hashem?ref=tn_tnmn hashem

    my sony ericsson xperia arc s lt18i
    is everything ok.But not see in display anything.what can i do?

  • arun

    I bought an unlocked Sony ericcson experia arc s, everything seems to be working fine but I could not connect to internet, dont know if it is an issue with my service provider, saved their settings didnt work, contacted them and edited settings manually, still no go.the internet connects fine with old phone.I heard there can be issues with internet for unlocked phones.If it is the issue, can I update to ICS and correct that.

  • hamza

    bhai it takes too much time to installing this is the last step????? tell me???

  • ranjith

    new ver.is 4.0.4????????????????????????????

    • Viraj SK

      For Arc S, yes…

  • ranjith


    • Viraj SK

      You’re welcome ranjith..

  • Umer Awan

    Sir I have already upgraded my phone on ics but auto rotate is not working i just want to know if i re upgrade my phone by ur method will this issue be resolved
    reply asap

    • Viraj SK

      I think yes..

      • Umer Awan

        it didn’t work

        • Viraj SK

          Was it working with Gingerbread?

        • Umer Awan

          yes i have new mobile 1 day old having error since i upgraded hope u will figure out the issue and help me


    Hiii viraj,
    i have also upgraded my xperia arc s to ICS 4.0.3
    is this a stable version? because i face lots of problem with upgradation to 4.0.4,
    And is it safe to use yours steps to ugrade to 4.0.4 so that no problems comes to my phone.
    and is 4.0.4 version more stable.
    Waiting for reply..

    • ADITYA

      Hey viraj,
      pls reply.

      • Viraj SK

        Those who are upgraded to ICS 4.0.4 using this guide, it’s working fine for them. Now try it for yourself & let me know…

        • ADITYA

          thanx a lot…


    what is bootloader ?
    how can i knw its locked or unlocked, also how can i unlock it,…
    please reply.


    did not get any .ftf File.
    pls tell complete procedure.

  • nivesh

    can i make sd card default storage in sony arc-s in ginger bread or ics without any root break.
    i m now using app2sd software for low storage solution in ginger bread.
    can u help me
    i want to update my to ics and want difault storage sd card.

    • Viraj SK

      Some apps can’t be moved to SD card storage without root. For e.g Facebook. Root is necessary to move such apps..

  • Sachin

    Hey im terribly sorry to be bothering you but when im tryin to flash my phone it shows an error sayin cannot find loader_unlocked.sin

    should i jst rename the loader.sin file? plz help

  • prathamesh

    I went to upgrade my phone to an upgrade centre.
    but the man out there told me that upgrade is not available for my IMEI number
    is this thing true???

    • Viraj SK

      That may be true but no issues. You can still upgrade it manually, using this guide…

  • mokh

    after 2 days i got my phone back to work
    great team

    hope i can root it and jelly benn it

  • Jawad

    Awesome worked for me … Thanks a lot man… Thanks Thanks Thanks

  • hemachandra

    Its working,thanks…………………………

    • Viraj SK

      You’re welcome Hemachandra..

  • hemachandra

    sir very thanks for your reply. Did you done this process on your phone or on your friends? if so is it working? Please help……. ……………

    • http://www.androidlegend.com Viraj SK

      Yes, its working..

  • Kashif

    After the update my device ( xperia arc s ) doesn’t auto rotate although I have checked to auto rotation in settings>display. Pls advise.

  • hemachandra

    sir once again sorry for asking, I wanted to know whether should my phone should be rooted? and another should I connect my phone in MTP or MASS STORAGE MODE. please help……

  • hemachandra

    sir,thanks for your fast reply. once again I wanted to know whether my phone should be rooted and. also is this should be done while flashing “For 2011 devices line, be
    sure you are not in MTP mode

  • hemachandra

    sir,thanks for your fast reply. once again I wanted to know whether my phone should be rooted and is this should be done while flashing “For 2011 devices line, be
    sure you are not in MTP mode

  • hemachandra

    sir, I wanted to know whether my phone must be rooted? and also must my bootloader should be unlocked because I was new for flashing a rom. please help…..

    • http://www.androidlegend.com Viraj SK

      This isn’t a custom ROM. Its an official firmware. No need to root or unlock the bootloader of your phone..

  • Srujan

    help me from this….. what should i do now….

  • Srujan

    “For 2011 devices line, be
    sure you are not in MTP mode”

    what does this mean.. Please explain me what should i do now…. my process was stuck in the middle…

  • Srujan

    “For 2011 devices line, be
    sure you are not in MTP mode”

    please explain me what does this mean… my process was stuuck in middle

  • hahah

    is this the official stock rom for xperia arc s

    • Viraj SK


  • Ambioris

    Gracias Hermano, Thanks.

  • Ambioris

    Thank Very Much,Exelente, Gracias Hermano

  • Viraj SK

    Link updated. Check out..

  • Sajid Wasim

    Where I can download the LT18i (Version 4.1.B.0.587)?

  • Deepak

    Sir i have followed the steps as given by you. i have copied ftf file to firmwares folder and followed the instructions given. But after connecting the phone, flasstoll shows that Error – Read error 31 : A device attached to the system is not functioning and Error – Error flashing aborted. So please help me. my email id is ds_naren@rediffmail.com and my no is +919448153220. Please hepl

  • Deepak

    Sir i have followed the steps as given by you. i have copied ftf file to firmwares folder and followed the instructions given. But after connecting the phone, flasstoll shows that Error – Read error 31 : A device attached to the system is not functioning and Error – Error flashing aborted. So please help me. my email id is ds_naren@rediffmail.com and my no is +919448153220. Please hepl

  • Miguel23

    could anyone help me?, I did all the instructions but I get the following message: SIM network unlock PIN :(

  • dustball_

    is this stable?

    • Viraj SK

      Yes, it’s stable..

  • Rayed

    i cant pick call whn my phn is waiting..it shows unable to switch calls…can u help please…my phn is running on 4.0.4 build number 4.1.L.0.8…Thanx

  • http://www.facebook.com/rohan.mhatre.5836 Rohan Mhatre

    Flash tool is no longer available on mentioned link. Can someone please reupload / share different link for the same.

    • Viraj SK

      Link is fixed, please check…

  • denish

    the is .7z and flashtool need .ftf file,this is big mistek

  • Adam

    It’s Asking me to install drivers ?>> you never mentioned that in here

    • kaye

      happened to me too, what do I do now?

      • Viraj SK

        Drivers are located in Flashtool folder itself OR use PC Companion tool to install them automatically..

  • revingohil@gmail.com

    y cant i download it ?

  • savy

    could you make video guide about how to update Xperia Arc S ICS 4.x / 4.0.3 / 4.0.4 Firmware? please tell me and upload video guide in you tube. Thanks

  • vibol

    This rooting for phone locked or unlocked?

    • https://plus.google.com/109451511715592775195/posts Viraj

      bootloader should be unlocked..

  • chis

    what happens if i have a different build number, can i continue with this one?

    • https://plus.google.com/109451511715592775195/posts Viraj

      Yes, you can..