Update Sony Xperia Go ST27i to Official Android 4.1.2 JB Firmware [6.2.A.0.400]

Like Samsung’s Touchwiz NatureX UI, HTC’s Sense UI, Sony has it’s own user interface called Timescape UI. When popularity is concerned, Timescape UI is the best amongst other two. Sony is well known for their hardware and product design. Recently they launched Xperia Z with ton of features and as usual the best hardware. I said best hardware because along with Quad core processor and all that, it is water & dust resistant. One more thing about Xperia Z is it’s OS. Xperia Z comes with Android 4.1.2 on board. This is where Sony lags behind other manufacturers as they are very slow in providing updates.

Though they are slow in rolling out updates but with Timescape UI, the update looks better & that is why it is worth for waiting. After grand success of Xperia Z, Sony is now rolling out JB updates for other devices. And this includes Xperia Go too. Yes official JB update is now available for Xperia Go ST27i. This update has build number 6.2.A.0.400 and can be flashed manually using flashtool.

So go ahead, read & follow the instructions properly and Enjoy the all new Jelly Bean on your Xperia Go ST27i.

Disclaimer: Steps given in this article are risky & can cause damage to your device. You should not try to attempt these things if you are unaware of it. Please follow this guide completely at your own risk. We won’t be held liable if you damage your device while following this guide.

update sony xperia go st27i to official android 4 1 2 jb firmware 6 2 a 0 4000

This tutorial is compatible only with Sony Xperia Go ST27i. Implementing it on Xperia Sola / Xperia U or on any other device can cause permanent damage to your device.


  • Charge your phone at least up to 70% so that flashing process wont get interrupted.
  • It is highly recommended to backup all your data from internal memory (includes contacts, messages (SMS/MMS), call logs, Internet APNs etc.). Your phone data will get lost after installation of this firmware (excluding External storage).
  • Disable Antivirus solution on your PC.

Procedure to Upgrade Sony Xperia Go ST27i to Official Android 4.1.2 JB Firmware (6.2.A.0.400):

  • Download Xperia Flashtool from here. Well be using it for flashing the firmware.
  • Download Xperia Go ST27i Official Android 4.1.2 JB Firmware package (6.2.A.0.400) from here and save it any convenient location.
  • Install Flashtool that you’ve just downloaded in your computer. For the sake of convenience, install it in root directory of C: drive.
  • Navigate to C: –> Flashtool –> Firmwares and delete all the data over there if anything is present.
  • Now move ST27i_6.2.A.0.400_CE_1257-0353.ftf file in the above mentioned directory.
  • Open Xperia Flashtool. Select Flash option (Black Bolt icon) from the top left corner of the tool (Refer to image given below).
  • It will ask you to select either Flashmode or Fastboot mode. Select Flashmode & proceed further by hitting OK button.

update sony xperia go st27i to official android 4 1 2 jb firmware 6 2 a 0 4001

  • On next screen, Firmware selection window will appear. On left side, select ST27i (version 6.2.A.0.400).
  • In right side of the tool, tick following 4 options (Caution! Dont tick any other option than 4 mentioned below).
  1. Wipe data.
  2. Wipe cache.
  3. Wipe apps log.
  4. No final verification.

update sony xperia go st27i to official android 4 1 2 jb firmware 6 2 a 0 4002

  • Press OK. Wait for Flashtool to prepare firmware installation.
  • Now, it will ask you to connect your phone. Before you connect your phone to computer, enter into Flashmode on it. To do so, switch off the phone completely. By holding Volume down key, connect it to PC. If done correctly, you should see a green light on the power.
  • After establishing proper connection with the computer, flashing process will start. Firmware installation process may get stuck around 93%, which is normal. It stays there for 20-30 seconds and not more than that.
  • Once you get Flashing finished message in Flashtool, remove your phone from PC & wait for it to reboot (It may take more time than usual for booting the device, which is normal. So don’t get panic & be patient).

There you go! Android 4.1.2 JB firmware is successfully installed on your Sony Xperia Go ST27i. Do let us know how JB is doing for you. And lastly, if you need any help, just drop a comment below & we’ll be there for you. Enjoy..

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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+.
  • Viraj SK

    Yes you can.

  • Hatim Shiraz

    Good Evening Viraj :)
    I am using Xpeia Go-ST27i
    but unfortunately my mobile CAMERA & FLASH LIGHT is not working.
    (* error camera not available *)
    It’s out of warranty, so !! i can not take it to sony service center as they are asking to replace my handset by taking 7000rs.
    Is there any other solution to recover my lost camera and flashlight…if so do help me please.
    Hatim, Bhopal.

    • Viraj SK

      Try this:

      Settings > apps > all > camera > clear everything > restart your phone > try again

  • chandraaditya putrevu

    works thx! my phone was dead and now it is working thx!!!!!!!!!!!!

  • Viraj SK

    Link updated.

  • ronald

    sir i update my experia go like you saidin youre post,but when i started to download and played the game it started to pause and resume several times and then it will go back to my home screen i dont know waht to do pls help me??

  • Gvidas

    Thx You waked up my dead phone YEAHHHHHHHHHHH !

  • Taing chinn pao

    Hi Sir. Can we Root now for this firmware?

  • Asad

    Hi.. Thanks soo much this Article..

    am trying to upgrade, but am getting this error..

    27/010/2013 16:10:13 – INFO – Device connected in flash mode
    27/010/2013 16:10:13 – INFO – Opening device for R/W
    27/010/2013 16:10:13 – INFO – Start Flashing
    27/010/2013 16:10:13 – INFO – Processing loader
    27/010/2013 16:10:13 – INFO – Checking header
    27/010/2013 16:10:13 – INFO – Ending flash session
    27/010/2013 16:10:13 – ERROR –
    27/010/2013 16:10:13 – ERROR – Error flashing. Aborted
    27/010/2013 16:10:13 – INFO – Device connected in flash mode

    what do i do with this??

    • KEVIN

      I encounter this problem also, and try it again :( because I accidentally disconnect the phone :(

  • peter

    since upgrading my xperia go to version 4.1.2 all my pictures can only be accessed in file commander. i dont like this as you cant see what they are unless you open them one at a time.pls tell me how to get them back to the album folder

  • dale james

    I made a backup of everything to the memory card before i used the update but lost all my contacts information as a result of the update. Is there anyway i can recover the
    PS: thanks for the update, it works properly.

  • https://www.facebook.com/johnbatalla135 JM-frm QC Philippines

    Tnx sir Viraj Sk… my xperia go is functioning now. more power sir.. ^_^…
    can i have a request?? can u post the link of .tft of ICS for xperia GO/?? tnx more power

  • shubham tyagi

    sir how would i root the anroid?????

  • joc

    sir i notice the ST27i_6.2.A.0.400_CE_1257-0353.ftf in the site..but when i download it, it became ST27i_6.2.A.0.400_CE_1264-7472_RH1.ftf..is their any diff sir..?

  • heru

    how to root sony xperia st27i go jelly bean version

    • heru

      This master firmware download why long

  • ponycorn

    sir my xperia go touch screen is not smooth now at all..can you help me to fix this problem..tnx in advance and more powers..

  • Erwin Alincastre

    i will try to my cellphone =)

  • Cvetelin Kamenov

    11/023/2013 21:23:19 – INFO – Ending flash session
    11/023/2013 21:23:19 – ERROR –
    11/023/2013 21:23:19 – ERROR – Error flashing. Aborted
    11/023/2013 21:23:19 – ERROR – Drivers need to be installed for connected device.
    11/023/2013 21:23:19 – ERROR – You can find them in the drivers folder of Flashtool.

    what must I do ?

    • Shreyas

      Check whether you have properly installed the drivers? Or try reinstalling them

      • Cvetelin Kamenov

        which drivers ?

        • Viraj SK

          Device specific drivers that are needed to be installed in your PC (You can use Sony Companion instead)…

        • tetranius

          i have pc companion installed yet, i too, get this error

  • akosiedrian

    Hi Sir,

    Can i ask if u have procedure how to root st27i? I want to root my phone and i want to do rooting using u’re procedure. thanks. :)

    • Viraj SK

      As of now, we don’t have any article upon rooting of Xperia Go smartphone. But we’ll be posting it soon. Stay tune…

  • Ram

    Hi Viraj,

    Please help me out, i have Xperia GO ST27i, i don’t know the reason my phone was shutdown and when i switch on it its showing sony and xperia then shutdown and again sony , xperia… how to bring back my phone into normal mode… please help me Viraj

    • Viraj SK

      Did you flash the JB firmware?

      • Ram

        I don’t know the process, please update me the process will do that. i haven’t done any thing till now from i bought the phone. coz my brother is using this phone he don’t know abt internet. he jst use the phone.

        • Viraj SK

          Then just follow the procedure written above, your phone will come back to normal mode (with latest firmware update)…

        • Ram

          Viraj, My phone is not even turning on.. its just flashing sony then xperia then repeting sony xperia……….

        • Viraj SK

          Was there any error while you flashed the firmware?

  • phyodjice

    HI . Sir Can you tell me how to root it I can’t get any root promise

  • balakrishna


    • Viraj SK

      I didn’t get the point. Can you please explain clearly?

      • Balakrishna

        Installed jb successfully after that I connected yo WiFi and checked for any updates then one system update of 6.2.a1.100 is showing. What z d difference bw 400 and 100.again one more thing z hw to see ad card contents ‘coz I have saved(backup) all my previous aapps in sd card

        • Shreyas

          Download external file manager like ES file explorer.

        • balakrishna

          THANX Mr.

      • balakrishna


        • Viraj SK

          Is it pre-loaded with the firmware?



          by unchecking at device administators mcafee has uninstalled. But my new problem is with GPS , its not at all locking with my position plz help….while in ICS it is fine

  • akosiedrian

    Hi sir,

    Can i ask how to restore my st27i from jelly bean to ginger bread again? I lost almost 2gb of my internal memory because I didn’t uninstall my apps on ginger bread before I turned it to jelly bean. And if I restore my OS to my previous one, will my apps still installed on my phone? Pls advise. thanks!

    • Viraj SK

      You can get Gingerbread ftf from here: http://forum.xda-developers.com/showthread.php?t=1933192

      Secondly, you can’t get back your apps (that were installed on your previous GB)….

      • akosiedrian


        Last question, can i recover the memory that i’ve lost on ginger bread? how can i recover the internal memory of my phone? thanks again sir! :)

        • akosiedrian

          also, how can manage my external memory? there is no menu for sdcard manager like ASTRO on gingerbread. thank you very much again sir!

        • Viraj SK

          Sadly, you can’t recover the lost data…

  • akosiedrian

    Thank you sir! :D
    successfully installed! :))

    • Viraj SK


  • thamizh

    while connecting device my getting switched on wht i hav 2 do?????plg guide me?????

  • thamizh

    how 2 do step 5 pls explian me????

    • Viraj SK

      Are you talking about this step? “Now move ‘ST27i_6.2.A.0.400_CE_1257-0353.ftf’ file in the above mentioned directory.

      • thamizh

        no i hav done it while connecting device by holding back key after sometime my mobile gets switched on…and process ends what can i do now?????

        • Viraj SK

          Try with another OS like Windows XP. (It seems that your phone is booting into flash mode for very short period)…

        • thamizh

          i hav tried with xp still have same problem wht can i do knw?????

        • Viraj SK
  • Subway Surferz

    Thanks for the guide ,

    installed successfully.

    • Viraj SK

      Welcome buddy :)

  • Ang3lyna

    I have the same problem… Please Viraj, help us!

  • pokoko

    press and hold VOLUME DOWN. then connect to pc


    Sir i have the same problem :( please help us!