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S8+ Wont Update

Discussion in 'Android Devices' started by AxelzX, Jun 29, 2019.

  1. AxelzX

    AxelzX Lurker
    Thread Starter

    I recently bought a used S8 plus here in japan and im having problems updating it. The Download updates manually does nothing and every time i tried to Flash the firmware but every time it gives me security check fail bootloader.
    System info:
    System Info:
    Android 7.0
    Samsung Experience Version 8.1
    Baseband Version G955FDXXU1AQH3
    CSC XXV/XXV/SKC

    Phone INFO Samsung:
    Bootloader Version G955NKSU3CRI3
    PDA Version G855FDXXU1AQH3
    CSC version G955FOXM1AQH3
    Baseband Version G955NKOU3CRI1
    Original CSC code XXV
    Active CSC code XXV
    Avaiable CSC codes INS, ITV, THL, TUR, XEO, XFE, XME, XSG, XSP, XTC, XXV
    on the back of my phone it says SM-G955N, download mode is in korean and on the Recovery menu it says G950NKSU1AQG7.
     

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  2. mikedt

    mikedt 你好

  3. mikedt

    mikedt 你好

    Can't find anything for the SM-G955N variant. But I assume it's for Japan, like "N" for Nippon?
    Korean variants are SM-G955K.


    What are you using to try and manually update, Kies or Smart Switch. What does the Knox Status show, is it "Official" or "Custom"? And Warranty Void counter should be "0x0". If those are not as they should be, then OTA updates won't go through.
     
    #3 mikedt, Jun 29, 2019
    Last edited: Jun 29, 2019
    ocnbrze likes this.
  4. AxelzX

    AxelzX Lurker
    Thread Starter

    It says custom.
     
  5. AxelzX

    AxelzX Lurker
    Thread Starter

    I tried using OTA and Smart Switch, Knox Status says Custom and Void is 0x1.
    About this phone, on the back of my phone it says SM-G955N, the same as The K version. the problem is that the firmware is from the G955FD. I dont know wish version this phone actually is because of this.
     
    #5 AxelzX, Jun 29, 2019
    Last edited: Jun 29, 2019
  6. mikedt

    mikedt 你好

    Yeh, that's definitely been rooted and modified then. Samsung's normal methods of updating will not work on modified devices. That's why you're seeing the security check fail.

    Go here, and search for your particular phone varian. Hopefully it has the appropriate updated firmware, and instructions for flashing it. https://www.sammobile.com/firmwares/
     
    #6 mikedt, Jun 29, 2019
    Last edited: Jun 29, 2019
    ocnbrze likes this.
  7. AxelzX

    AxelzX Lurker
    Thread Starter

    I tried Flashing using the SM-G955FD firmwares but they all failed. i get the error secure check fail bootloader every time. i gonna try using the SM-G955N firmware to see if it works.
     
  8. mikedt

    mikedt 你好

    SM-G955FD that's the international dual-SIM variant. And that definitely won't work. Because international S8+ is Exynos processor, and the Japan variant is Qualcomm Snapdragon processor. You must have the correct firmware. The only other S8+ that's Snapdragon, are the China and US variants.

    The only other firmware that just might have a chance of compatibility, is the SM-G955U, which is unlocked North American for Snapdragon S8+. But no idea if it would actually work it not.

    Custom ROM maybe an option, if available for that variant.
     
    #8 mikedt, Jun 29, 2019
    Last edited: Jun 29, 2019
    ocnbrze and Hadron like this.

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