Tab S3 always booting into Odin/Download mode

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Whoooo?

Member
May 5, 2017
38
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Hi there,

Not sure what happened - I'm using my Tab S3 (SM-T820) for ages in the same (stable) configuration - rooted Stock, no changes/installations for months.

This morning it was in Odin/Download mode and I cannot boot into system.
I can get into recovery (TWRP), but I cannot boot into system from there either, it always returns to Odin (tried wiping Cache/Dalvik, didn't help).

For now my only idea is to let it completely discharge, charge again and give it another try.
No buttons appear to be stuck.

Any ideas or suggestions, eg sth I could check in TWRP to see what's going on?
(hopefully nothing wrong with the system partition).

Note - I'm only familiar with the typical TWRP functions needed to install custom firmware, haven't used it for much else. Obviously would prefer not to destroy my (stable) setup and spent a full day re-installing everything :(

Thanks a lot for your help everyone! :)
 
@Whoooo? Backup whatever possible with TWRP onto external storage (SD or OTG).
Check if file manager can access download/DCIM folders and save them as well.
Although the charging thing might help I wouldn't set my hopes to high.
Probably somethings wrong with system or boot partitions or any file needed by them.
I'm afraid you will have to reflash stock via Odin, root again and try if restoring TWRP saved Data works.
That would reduce setting up time.
 

Whoooo?

Member
May 5, 2017
38
20
@Whoooo? Backup whatever possible with TWRP onto external storage (SD or OTG).
Check if file manager can access download/DCIM folders and save them as well.
Although the charging thing might help I wouldn't set my hopes to high.
Probably somethings wrong with system or boot partitions or any file needed by them.
I'm afraid you will have to reflash stock via Odin, root again and try if restoring TWRP saved Data works.
That would reduce setting up time.
Hi there,

Thanks a lot for your reply - yes, I will try that once the complete discharge is finished.

Reflashing stock - could cause this any troubles as it's already unlocked/rooted?
Or is there a chance dirty flashing the Tweaked Stock ROM could work, too?
Tablet was still on the original Stock it came with, but rooted with magisk and manually debloated...

Thanks again!
 
I think Odin won't care about unlocked bootloader.
But might be necessary to unlock again.

Dirty flashing afaik only works with TWRP so only flashing of zip or img files possible.
Except you sideload although Idk if that's possible on Samsungs.
Dirty flashing of a before the problem arose made backup might work.

Did you debloat while already installed or externally?
What file format does it have?
My T825 uses the debloated ROM by rorymc628 which can be flashed with TWRP as it's a zip file.
 
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Whoooo?

Member
May 5, 2017
38
20
I think Odin won't care about unlocked bootloader.
But might be necessary to unlock again.

Dirty flashing afaik only works with TWRP so only flashing of zip or img files possible.
Except you sideload although Idk if that's possible on Samsungs.
Dirty flashing of a before the problem arose made backup might work.

Did you debloat while already installed or externally?
What file format does it have?
My T825 uses the debloated ROM by rorymc628 which can be flashed with TWRP as it's a zip file.
Hi there and thanks again -

Took me a while to try everything but finally it's working again.

Complete battery drain didn't help, but dirty flashing did - once I got the correct version.

Basically made a nandroid backup, then flashed the tweaked rom over my existing one, starting with newer versions down to older ones.
So, flash, reboot - didn't work, restore nandroid (all), flash slightly older rom....
Till it started booting with v2.0 (probably matching my existing rom close enough).

Had to reflash Magisk as the 2.0 Rom included didn't match my Magisk Manager, but now my Tab S3 is working again!
 

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    I think Odin won't care about unlocked bootloader.
    But might be necessary to unlock again.

    Dirty flashing afaik only works with TWRP so only flashing of zip or img files possible.
    Except you sideload although Idk if that's possible on Samsungs.
    Dirty flashing of a before the problem arose made backup might work.

    Did you debloat while already installed or externally?
    What file format does it have?
    My T825 uses the debloated ROM by rorymc628 which can be flashed with TWRP as it's a zip file.