@arubislander I originally changed password in terminal because I could not change the password I set when installing with settings manager.

Ok I want to change my default password. The issue is that when I set a numeric password I cannot change it via character keyboard.
I changed my password in terminal and now I cannot change it back. When unlocking the phone I have to fail 4 times on numeric keyboard so the system will offer me character keyboard, then it works.
I tryed reinstalling UT but it preserves my password settings.
It seems like numeric and character keyboards are somehow not the same.

Regards

Great so we can mark this thread as SOLVED!

Thanks Guys.

@Dieter42 Ok back to this particular fastboot issue; could I leave the bootloader as it is and flash UT on a and Mobian on b? Would I be able to boot both? List of commands would be much appreciated.

And I get stuck at boot screen because newer version of UT does not work with OP 6, and that is why I flashed mobian in the first place!!!

@Dieter42 Ok first I would like to try something else then I will come back to fastboot.

But first after installing Android 9 I try to install UT with installer and when it finishes I get stuck at boot screen.

Oh! Maybe I could flash Android 9 exactly!

It seems like I cannot get in to "Recovery mode" of the phone(actually both 6 and 6t). When I choose recovery mode it just reboots the device.
Does somebody know what the problem might be or can I fastboot flash UT to the device?

Ok did manage to install stock version android everithing needed in this video:
https://youtu.be/V4i7Dnflrsk?si=3dLhAOO-1CBTM6eo

I get an error with msmdownloadtool, something about package not beeing present...