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Thread: can i downgrade from this firm ? tab s4 t835

  1. #1
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    can i downgrade from this firm ? tab s4 t835

    hello i have this firm T835XXU4BTB2 and i have problems with ping latency drops on games which should be strange for such hardware device , so i want to try older firmwares to see if its fault or its from hardware build how much i can go down from this list with odin isntal [ Login above or register to see download links. ] ?

  2. #2
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    Quote Originally Posted by digitmobile [ Login above or register to see download links. ]
    hello i have this firm T835XXU4BTB2 and i have problems with ping latency drops on games which should be strange for such hardware device , so i want to try older firmwares to see if its fault or its from hardware build how much i can go down from this list with odin isntal [ Login above or register to see download links. ] ?
    Hi there

    That depends on what you want to install...

    This firmware is the only downgrade you can perform: [ Login above or register to see download links. ]

    If you want to downgrade to previous build, you need to flash AP BL CP & CSC_OXM (NOT HOME_CSC!): your device will reset afterwards which is mandatory...

  3. #3
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    Quote Originally Posted by henklbr [ Login above or register to see download links. ]
    Hi there

    That depends on what you want to install...

    This firmware is the only downgrade you can perform: [ Login above or register to see download links. ]

    If you want to downgrade to previous build, you need to flash AP BL CP & CSC_OXM (NOT HOME_CSC!): your device will reset afterwards which is mandatory...

    btw should i unlock OEM option and usb debug on or off ? from dev setting for this OEM downgrade ? and what will happen if i instal XEF france firm the new android 10 ?

    i want to instal OEM previuos version by easiest way to try if network latency will gone so if this is the only vesion i can instal by this way with odin ? Download Odin v3.14.4

    Extract the firmware file you just downloaded. You should get 5 files:
    AP (System &Recovery)

    BL (Bootloader)

    CP (Modem / Radio)

    CSC_*** (Country / Region / Operator)

    HOME_CSC_*** (Country / Region / Operator)

    Add each file to its respective field in Odin v3.14.4. Use CSC_*** if you want to do a clean flash or HOME_CSC_*** if you want to keep your apps and data.
    Reboot your phone in Download / Odin mode (make sure your device is off) with the following button combo: POWER + VOLUME DOWN + BIXBY
    Other options in case first option did not work or isn't possible.

    Option 2 VOLUME DOWN + VOLUME UP then USB cable

    Option 3 POWER + VOLUME DOWN + VOLUME UP

    Option 4 POWER + VOLUME DOWN + HOME BUTTON

    Option 5 (Note9) USB cable + VOLUME DOWN + BIXBY

    Option 6 (Note10) POWER + VOLUME UP

    Once in download mode, connect your phone to the PC, preferably using the original USB cable you got with your phone. Odin should detect your device and a BLUE box will show up with the COM port number. (Be sure, the SAMSUNG-drivers are installed on your PC!)
    Do NOT tick any extra boxes. The only options to be ticked are F.Reset Time and Auto-Reboot.
    Click the start button, wait for Odin to say 'PASS' in a GREEN box. Once the flash is complete, your phone will reboot, and you can disconnect your phone from the PC.
    Last edited by digitmobile; 25-06-2020 at 14:36.

  4. #4
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    Could you go to Software Info on your device, screenshot it from top to bottom and post it here?

  5. #5
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    Quote Originally Posted by henklbr [ Login above or register to see download links. ]
    Could you go to Software Info on your device, screenshot it from top to bottom and post it here?
    [ Login above or register to see download links. ]

  6. #6
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    Quote Originally Posted by digitmobile [ Login above or register to see download links. ]
    [ Login above or register to see download links. ]
    Thanks for your screenshot

    You can install Android 10 on your device: [ Login above or register to see download links. ]

    Flash AP BL CP HOME_CSC_OXM with Odin 3.14.x -> your data will stay intact

  7. #7
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    Quote Originally Posted by henklbr [ Login above or register to see download links. ]
    Thanks for your screenshot

    You can install Android 10 on your device: [ Login above or register to see download links. ]

    Flash AP BL CP HOME_CSC_OXM with Odin 3.14.x -> your data will stay intact
    tnx man will something from my LTE will be ruined cus android 10 is XEF and now my csc is BLG ? and if so can i downgrate to this rom from screenshot ?

    and man do i need to unlock OEM from devoloper setting and usd debug on or off ? while instal with odin


    in that order to flash them first AP, 2nd BL, 3rd CP ,last HOME_CSC_OXM ?
    Last edited by digitmobile; 25-06-2020 at 19:53.

  8. #8
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    Quote Originally Posted by digitmobile [ Login above or register to see download links. ]
    tnx man will something from my LTE will be ruined cus android 10 is XEF and now my csc is BLG ? and if so can i downgrate to this rom from screenshot ?

    and man do i need to unlock OEM from devoloper setting and usd debug on or off ? while instal with odin


    in that order to flash them first AP, 2nd BL, 3rd CP ,last HOME_CSC_OXM ?
    You don't have to change anything on your tablet (OEM, debug etc...)

    If you install Android 10, you can downgrade to Android 9 (if the bootloader version is the same (4).

    LTE won't be ruined... (BGL & XEF are both in Multi-CSC OXM)

    Is this the first time you're trying to flash?

    ALL 4 files, AP BL CP & HOME_CSC_OXM, go at once in Odin...

    How to flash firmware to your phone:



    1. Extract (un-rar) the firmware file (i.e. to folder c:\Odin) ***
    2. Download [ Login above or register to see download links. ]
    3. Extract Odin ZIP file (i.e. to folder c:\Odin)
    4. Open Odin v3.14.1
    5. Power OFF your Tab S4
    6. Reboot Phone in Download Mode: Hold down Vol-UP & Power; scroll in Recovery to "Boot to Bootloader". Connect your Tab S4 to your PC
    7. Wait until you get a blue sign in Odin
    8. Add the firmware files to their designated slots (AP in AP, BL in BL, CP in CP, HOME_CSC in CSC). USERDATA stays EMPTY!
    9. Make sure re-partition is NOT ticked
    10. Click the start button, sit back and wait few minutes

    Use SamMobile only if you are 100% sure about the risks involved in flashing your device. SamMobile is not responsible for any damage caused by using the files on this website.

    PS: be sure, the correct Samsung drivers are installed on your PC

  9. #9
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    Quote Originally Posted by henklbr [ Login above or register to see download links. ]
    You don't have to change anything on your tablet (OEM, debug etc...)

    If you install Android 10, you can downgrade to Android 9 (if the bootloader version is the same (4).

    LTE won't be ruined... (BGL & XEF are both in Multi-CSC OXM)

    Is this the first time you're trying to flash?

    ALL 4 files, AP BL CP & HOME_CSC_OXM, go at once in Odin...

    How to flash firmware to your phone:



    1. Extract (un-rar) the firmware file (i.e. to folder c:\Odin) ***
    2. Download [ Login above or register to see download links. ]
    3. Extract Odin ZIP file (i.e. to folder c:\Odin)
    4. Open Odin v3.14.1
    5. Power OFF your Tab S4
    6. Reboot Phone in Download Mode: Hold down Vol-UP & Power; scroll in Recovery to "Boot to Bootloader". Connect your Tab S4 to your PC
    7. Wait until you get a blue sign in Odin
    8. Add the firmware files to their designated slots (AP in AP, BL in BL, CP in CP, HOME_CSC in CSC). USERDATA stays EMPTY!
    9. Make sure re-partition is NOT ticked
    10. Click the start button, sit back and wait few minutes

    Use SamMobile only if you are 100% sure about the risks involved in flashing your device. SamMobile is not responsible for any damage caused by using the files on this website.

    PS: be sure, the correct Samsung drivers are installed on your PC
    tnx thats what i needed all at once , i got samsung mobile phone drivers , also i read that need to connect it to usb 2 not 3 on the PC right ?

  10. #10
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    Quote Originally Posted by digitmobile [ Login above or register to see download links. ]
    tnx thats what i needed all at once , i got samsung mobile phone drivers , also i read that need to connect it to usb 2 not 3 on the PC right ?
    NOT to USB-3

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