Bootloop after 6.0.1 OTA update - Nexus 9 Q&A, Help & Troubleshooting

2 weeks ago I did a 6.0.0 to 6.0.1 OTA update and my device went into I a so called bootloop.
I tried everything on http://www.skipsoft.net/?page_id=1647 - without success.
The factory reset and the options in the recovery menu of the Nexus 9 did not help.
I cannot load a new image because I did not Enable the developer options nor the USB debugging via the menu when the device was OK.
I installed the SKIPSOFT UNIFIED ANDROID TOOLKIT and connected to my Nexus 9 (WiFi).
I connected successfully to the device and tried the UNLOCK BOOTLOADER part of the app.
It didn't work - it gives "ERROR - you have to enable debugging mode in order to unlock".
So, the question is: Can you unlock the bootloader with the SKIPSOFT UNIFIED ANDROID TOOLKIT if one did not Enable the enable developer options nor the usb debugging via the android menu?
If not, can you suggest to me what may be my options as I am stuck. Warranty of the device has just passed.
Thank you in advance,
S.

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If you can get into recovery, you might be able to sideload the OTA again: - http://forum.xda-developers.com/nexus-9/help/failed-marshmallow-update-stock-android-t3226704
Get the January OTA zip from here: - http://forum.xda-developers.com/showpost.php?p=64693937&postcount=557
Or whatever OTA you need from that thread.

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xyz

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Thank you very much for your comment corkiejp. I just followed the sideloading sith the January 6.0.1 update packae and.... IT WORKED Thank you very much. God bless this community

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bluesharp said:
Thank you very much for your comment corkiejp. I just followed the sideloading sith the January 6.0.1 update packae and.... IT WORKED Thank you very much. God bless this community
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Click to collapse
Your welcome, remember to enable "OEM unlocking" in developer options, even if you have no intentions of using it at present!

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corkiejp said:
Your welcome, remember to enable "OEM unlocking" in developer options, even if you have no intentions of using it at present!
Click to expand...
Click to collapse
I just enabled oem unlock. i am writing this from my nexus 9, and i have you friend to thank for

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I had same problem, couldn't get the recovery method to work properly.
Was able to return to HTC for repair, just received it back today.... got even worse. Started to set up again.
Here is list of problems:
first it froze on the homescreen on initial start up
froze while updating the google apps
now doing the reboot thing
frozen on the lock screen
can hear a soft 'tap' sound while in locked mode
Needless to say will be returning to retail for full refund.
Something tells me either Android or manufactures haven't fully tested Marshmallow properly with hardware, as having bad problems with my LG G4 also on M6 and gone for repair.

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So I have the same problem. While updating to 6.0.1 there was an error message and after that it got into a bootloop. Can I sideload when I don't see character identifier for my device as described in point 4 in the link? All I see is "OS - n/a"

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Kuhuma said:
So I have the same problem. While updating to 6.0.1 there was an error message and after that it got into a bootloop. Can I sideload when I don't see character identifier for my device as described in point 4 in the link? All I see is "OS - n/a"
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Click to collapse
At your own risk. You could try with the latest OTA zip linked above.
It shouldn't do anymore damage, probably just fail if your system was on an earlier version than what this updates from.
If it fails, try an earlier OTA.
Report back on your progress.

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corkiejp said:
At your own risk. You could try with the latest OTA zip linked above.
It shouldn't do anymore damage, probably just fail if your system was on an earlier version than what this updates from.
If it fails, try an earlier OTA.
Report back on your progress.
Click to expand...
Click to collapse
I followed every step but I'm stuck at step 9 and 10. Neither I see "Wipe Cache" nor "Apply update from ADB". Is it because I never unlocked developer options on my device? I'm in Fastboot Mode btw.

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Kuhuma said:
I followed every step but I'm stuck at step 9 and 10. Neither I see "Wipe Cache" nor "Apply update from ADB". Is it because I never unlocked developer options on my device? I'm in Fastboot Mode btw.
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Very strange that your recovery screen does not have them options. (dev. options shouldn't matter).
Try rebooting in recovery and check them again.
You can also do a factory reset from the hboot menu, which might resolve your problems.

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corkiejp said:
Very strange that your recovery screen does not have them options. (dev. options shouldn't matter).
Try rebooting in recovery and check them again.
.
Click to expand...
Click to collapse
Ah, this helped me. I have to press volume up only once. :silly:
I'll report my progress.
---------- Post added 29th January 2016 at 12:25 AM ---------- Previous post was 28th January 2016 at 11:28 PM ----------
It worked. Thank you so much for your help. Only thing i f***** up, was the recovery mode. I held the volume up button for too long and always ended up in fastboot mode.