Having problems rolling back to Android 6.

I put the phone into Download Mode (switching on with Home + Power + Volume down followed by Volume up)

Connect to Odin 3 v3.12 (and get Added!!)

Add in the md5 file to the AP section (which takes a few minutes)

When I hit Start it instantly fails with this stack trace....

Get PIT for mapping..

Firmware update start..




Complete(Write) operation failed.

All threads completed. (succeed 0 / failed 1)

On the S6 screen I get...


Fail Screenshot

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    Most Samsung devices don't permit a downgrade since the bootloader is the latest with new OS and that prevents a downgrade – beeshyams Aug 2 '17 at 13:43
  • Could I ask why you want a downgrade? – Wrichik Basu Aug 2 '17 at 13:51
  • Android 6 devices are on our list of supported devices and want them to run this OS rather than 7 for testing/support. – chris_elevate Aug 2 '17 at 14:11
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    Unfortunately, all Nougat firmwares (and even some late Marshmallow ones) are already on bootloader level 5, therefore downgrading through official means is impossible. It might be possible to load the device up with a custom recovery, then flash a custom ROM based on Marshmallow, but compatibility isn't guaranteed. – Andy Yan Aug 2 '17 at 15:24
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    @chris_elevate Then no go. The screen already tells you that by showing the red alert Device: 5, Binary: 4. As I said, if you don't mind warranty void, you can always try custom ROMs and see if they'd work. – Andy Yan Aug 3 '17 at 2:58

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