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Thread: Stuck at bootloop even after flashing to stock rom

  1. #1
    Junior Member
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    Stuck at bootloop even after flashing to stock rom

    My phone suddenly got into a bootloop, while I was using it.
    The phone is not rooted nor flashed or updated.
    I can get into recovery and download mode
    The steps I took to fix the problem:

    1. Wipe cache data/Factory reset
    2. Flashing stock rom with odin Android 7.0 with succes (Android 6.0.0 gave an odin error) + Wipe cache data/factory reset

    Does anyone know what I can do to fix the bootloop problem?

  2. #2
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    Dec 2011
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    Can you check your phone USB port for dirt or water?

    If Ok, see if SmartSwitch will reinstall your firmware:
    [ Login above or register to see download links. ]

    How has your battery been recently?
    Has it been losing more charge than ususal?
    Has it been getting hotter than usual?

  3. #3
    Junior Member
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    Thanks for the reply!

    I have checked for water or other dirt none found, the port seems clear.
    I cannot use the reset function of SmartSwitch. I get this message
    Device reset function is no longer supported

    To reset the device, use the Reset function in Settings.
    → Go to Settings > General management > Reset
    - Reset network settings
    - Reset to factory defaults
    - Reset all settings

    Dont think my battery has been unusual..
    Last edited by mk1991; 06-11-2017 at 23:35.

  4. #4
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    SmartSwitch worked well until Samsung made some changes in the last update.

    Can you turn off your phone and reboot in SAFE MODE?
    This will test for the problem being a rogue app.
    [ Login above or register to see download links. ]

  5. #5
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    Hmm that sucks....
    The only way I can completely turn off the phone is by going into recovery mode and selecting the option Power off.
    But each time I boot or try to go into safe mode after "powering off", the phone first shows: Installing system update and Error no command. After this it goes into recovery mode.

    Update: I managed to shut down the device by pressing volume down + power button in recovery mode.
    The power off option became green and I guess this really powered off the device, because I see the battery loading icon. However I still cannot get into safe mode because the boot loop occurs when I try it.
    P.S I dont know if it helps but I can flash twrp recovery.

  6. #6
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    The phone would appear to be in FRP (Factory Reset Protection)
    This is a Google security to prevent unauthorised use.
    If you are the first owner of this phone but have forgotten the Google Account password that is on the phone then you can change it here:
    [ Login above or register to see download links. ]

    If you are a second owner then the original owner should have removed their Google account.
    Without the Google account password you are locked out of the phone.

  7. #7
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    I am the first owner of the phone and have access to the google account, but I did not see anything with a google login.
    How do I unlock this?

  8. #8
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    The steps you have taken should have removed the usual firmware reasons for a bootloop.
    That leaves you with a hardware issue.

    Was the battery giving any concern?
    Running down more quickly, overheating, not charging to 100%?
    If not the battery then a component failure seems a possibility.

  9. #9
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    The battery was sometimes running down more quickly, but no overheating or not charging to 100%.
    But there was a strange problem that the phone suddenly got into download mode without triggering it.
    This occured a couple of times previous year. Each time the phone would suddenly get into download mode and stay there until the phone had no battery left. After that it booted and worked again.

    I think the phone still has warranty, but the last time I checked the knox counter was set to 1. Is that a problem?

  10. #10
    Senior Member
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    Quote Originally Posted by mk1991 [ Login above or register to see download links. ]
    The battery was sometimes running down more quickly, but no overheating or not charging to 100%.
    But there was a strange problem that the phone suddenly got into download mode without triggering it.
    This occured a couple of times previous year. Each time the phone would suddenly get into download mode and stay there until the phone had no battery left. After that it booted and worked again.

    I think the phone still has warranty, but the last time I checked the knox counter was set to 1. Is that a problem?
    Warranty is lost with anything other than Knox 0x0.
    Whether this affects your right to a free repair may be down to you and what the service centre find.
    If changing the firmware is not a contributing factor to the problem then you could argue that any repair should be free.
    Be prepared for a battle.

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