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Thread: Samsung Galaxy Tab A SM-T550

  1. #1
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    Samsung Galaxy Tab A SM-T550

    Hi,

    i am getting this message after flashing 6.01 in Odin:

    "No Support SINGLE-SKU"
    "Supported API: 3"
    "dm-verity verification failed..."

    What does this mean?

  2. #2
    Senior Member
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    Wrong firmware.
    See if SmartSwitch will reinstall the latest version of the original firmware.

    Try using method in post #2 here:

    [ Login above or register to see download links. ]
    Last edited by greenman; 13-06-2017 at 19:48.

  3. #3
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    Did it with Smartswitch...still the same...

    Is it a hardware problem?
    Last edited by cardic; 13-06-2017 at 20:58.

  4. #4
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    Quote Originally Posted by cardic [ Login above or register to see download links. ]
    Did it with Smartswitch...still the same...

    Is it a hardware problem?
    No. The dm-verity error is usually from installing the wrong firmware or modifying your Tab by rooting or installing a custom recovery.

    Can you dial *#06#
    This is your imei.
    Check it against the imei on a sticker on your Tab or original documentation.

  5. #5
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    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    No. The dm-verity error is usually from installing the wrong firmware or modifying your Tab by rooting or installing a custom recovery.

    Can you dial *#06#
    This is your imei.
    Check it against the imei on a sticker on your Tab or original documentation.
    You are right with the rooting, but I haven't done it. The previous owner did it.

    I just wan't it back to stock.

    Can't dial...it's got no slot for simcard...

    But it has S/N number, and that checks allright with the sticker on the back.

    Right now I have no clue what to do...

  6. #6
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    Try this:
    Reinstall latest firmwate with odin.
    Note: in Odin Options/Settings turn OFF AUTO reboot.

    Install TWRP recovery as described here:
    https://forum.xda-developers.com/galaxy-tab-a/development/recovery-t3426560

    Install SuperSU as in above link under root.

    Reboot and wait.
    Note:
    This can take a long time, so be patient

  7. #7
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    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    Try this:
    [FONT="]Reinstall latest firmwate with odin.
    [/FONT]
    Note: in Odin Options/Settings turn OFF AUTO reboot.

    [FONT="]Install TWRP recovery as described here:
    [/FONT]
    https://forum.xda-developers.com/galaxy-tab-a/development/recovery-t3426560

    [FONT="]Install SuperSU as in above link under root.[/FONT]

    Reboot and wait.
    Note:
    This can take a long time, so be patient
    Newest firmware installed: Done!
    TWRP Installed: Done and works!
    SuperSU installed: Done!

    Result: Stille the same as of how the tablet behaves...a lot of apps are stopping when you arrive at the desktop after tablet boots and tablet restarts by it self 10 times a day.

    But it did that before twrp and supersu also.

    Time to junk it...?

  8. #8
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    Also installed a custom kernel...made it somewhat more stable.

  9. #9
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    Quote Originally Posted by cardic [ Login above or register to see download links. ]
    Also installed a custom kernel...made it somewhat more stable.
    More stable - and so problem solved

  10. #10
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    Quote Originally Posted by greenman [ Login above or register to see download links. ]
    More stable - and so problem solved
    Well...allright we'll leave it at that.

    Thanks for all your help.

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