need help to restore firmware to defaultSupport


  1. apk x64

    apk x64 Active Member

    hi ! guys i just manualy installed ICS 4.0.3 firmware on my GB 2.3.5 and now i am haveing some problems like my serial number ,ip address and bluetooth address are missing now . can anyone know how to fix it or how i downgrade to my default firmware which i got with phone . thanks

    default CSC code=i9100OJPKJ1

    ICS version info
    pda I9100xwlp7
    phone I1900xxlps
    csc I9100xeulps

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  2. Forbidden 403

    Forbidden 403 Well-Known Member

    restoring to the default firmware is the same as flashing a new firmware.
    download the firmware and flash.

    but serial number missing etc seems like an issue with your efs partition.
    You might have to try to restore it if you have a backup of the efs.
    apk x64 likes this.
  3. apk x64

    apk x64 Active Member

    so do you have any resumable link i found one but it's non-resumable and here (PUNJAB) internet speed is only 50-80 KB/s and i failed may time .
    hxxp://www.4shared.com/rar/m7L3ntKI/I9100JPKJ2_Android_235.htm

    and i will move to UK in month so i won't have any way to download that file :/
  4. apk x64

    apk x64 Active Member

    one more thing what is that efs partition i just flash that OS file .
  5. Forbidden 403

    Forbidden 403 Well-Known Member

    Here is the link that you asked for
    GT-I9100_EGY_I9100JPKJ2_I9100OJPKJ1_I9100XXKI4.7z

    EFS partition is the special partition on the phone where all info regarding serial numbers, mac addresses, hardware ids are stored.

    Somehow it's gotten messed up. Can you see your imei number by dialing *#06# ??

    If not then you have to recover it. By any chance did you backup your efs ??
    apk x64 likes this.
  6. apk x64

    apk x64 Active Member

    yes i am able to see my imei number is it OK ?
  7. Forbidden 403

    Forbidden 403 Well-Known Member

    well at least all is not lost if you can see the imei number.

    See if a factory reset solves the issue or not. if you are rooted there are some apps available to backup and restore your efs.
    apk x64 likes this.
  8. apk x64

    apk x64 Active Member

    well but let me first go back to GB 2.3.5 version then i will post back if any thing happen :)
  9. Forbidden 403

    Forbidden 403 Well-Known Member

    Best of Luck.
    apk x64 likes this.
  10. apk x64

    apk x64 Active Member

    alright everything is fine now but my bluetooth address and wifi mac address both are unavailable ,any idea ?
  11. Forbidden 403

    Forbidden 403 Well-Known Member

    are they switched on?
    you only see the address when it's on, as long as you can see the mac address or the physical address it should be ok.
    apk x64 likes this.
  12. apk x64

    apk x64 Active Member

    thank you very much they are unavailable cuz they are switched off now all is fine again :D
  13. alvnunez

    alvnunez New Member

    Wow, thanks god i found this thread, i have the same problem, updated to 4.0.3 and lost my serial number but not my imei.

    So resuming, you just had to downgrade to the original firmware right? or you had to do the efs thing?

    :shakehands:
  14. apk x64

    apk x64 Active Member

    yep that will do the trick ;) no need to fix efs thing.
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