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nieldk is offline nieldk
2016-01-24 , 17:47
Posts: 1,290 | Thanked: 4,319 times | Joined on Oct 2014
#41
Thanks for your answers guys. Much appreciated.
I did by now extract my certs and will try with flashing back original, closed mode pr1.3
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feuerplatz is offline feuerplatz
2016-01-24 , 19:20
Posts: 10 | Thanked: 62 times | Joined on Jan 2016
#42
Originally Posted by nieldk View Post
Thanks for your answers guys. Much appreciated.
I did by now extract my certs and will try with flashing back original, closed mode pr1.3
Does your start with a3959780 too? The version string is inside the cert, you may need to choose which certificate to write back to CAL.

Good luck to you anyway, be careful.
 

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nieldk is offline nieldk
2016-01-25 , 05:30
Posts: 1,290 | Thanked: 4,319 times | Joined on Oct 2014
#43
Originally Posted by feuerplatz View Post
Does your start with a3959780 too? The version string is inside the cert, you may need to choose which certificate to write back to CAL.

Good luck to you anyway, be careful.
Yes. Mine starts with a3959780 also.
I extracted all certs so far (cert-sw).

I assume that the ones that have the string "cert-sw" are relevant. For the latest (40) there are seertal (think I counted apx 12),
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feuerplatz is offline feuerplatz
2016-01-25 , 07:56
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#44
Originally Posted by nieldk View Post
Yes. Mine starts with a3959780 also.
I extracted all certs so far (cert-sw).

I assume that the ones that have the string "cert-sw" are relevant. For the latest (40) there are seertal (think I counted apx 12),
Well, mine had nine of them, but I only cared to extract first one, the last one, and the one from PR1.3 European version, which I flashed. All three were attached to my original post.
Wish you good luck again.
 

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nieldk is offline nieldk
2016-01-25 , 08:18
Posts: 1,290 | Thanked: 4,319 times | Joined on Oct 2014
#45
Originally Posted by feuerplatz View Post
Well, mine had nine of them, but I only cared to extract first one, the last one, and the one from PR1.3 European version, which I flashed. All three were attached to my original post.
Wish you good luck again.
great, then I am (almost) ready to brick my device hehe.
FYI. I have no need to really downgrade. Everything is in perfect condition. This is purely interest in the subject, but also, perhaps, helpfull for those with fx Chinese FW
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feuerplatz is offline feuerplatz
2016-01-25 , 09:00
Posts: 10 | Thanked: 62 times | Joined on Jan 2016
#46
Good luck bricking your device then

I still don't completely understand if the following quote refers for zeroing out certificate or just changing it, but if it's the former, then perhaps after some testing it's possible to make an app for downgrading for the eager ones. (not that anyone expects upgrades from Nokia anymore )
Originally Posted by rainisto View Post
(And if there is ever PR upgrade it would force Nokia to lock CAL even in normal mode)...
P.S. Can you compare your certificates with one in my tar.gz (matching the version of course)? I wonder if it's dependant on the phone indeed.
Last edited by feuerplatz; 2016-01-25 at 09:48.
 

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ViBE is offline ViBE
2016-01-26 , 22:09
Posts: 128 | Thanked: 105 times | Joined on Dec 2014 @ Hungary
#47
Originally Posted by feuerplatz View Post
In my case I downgraded DFL61_HARMATTAN_40.2012.21-3.454.6_PR_454 to DFL61_HARMATTAN_40.2012.21-3_PR_001, so yes, it should be quite possible.
oh yea. this would be cool. i can't wait for the final result

Originally Posted by nieldk View Post
great, then I am (almost) ready to brick my device hehe.
FYI. I have no need to really downgrade. Everything is in perfect condition. This is purely interest in the subject, but also, perhaps, helpfull for those with fx Chinese FW
exactly
 

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sunrianto is offline sunrianto
2016-01-30 , 07:58
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#48
Looking for good news.. : pray
Last edited by sunrianto; 2016-01-30 at 10:38.
 
nieldk is offline nieldk
2016-01-30 , 10:34
Posts: 1,290 | Thanked: 4,319 times | Joined on Oct 2014
#49
Hmm no luck in closed mode

(devel-su and develsh before issuing cal-writer command)

Code:
Debug: 2: cal_init() called
Error: open(/dev/mtd1): Permission denied
Couldn't open CAL for writing
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peterleinchen is offline peterleinchen
2016-01-30 , 11:01
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#50
Who cares about closed mode?
Just flash open mode, downgrade and the flash anew PR1.3 and you are back to stock
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