Absolutely Positively No Downgrade?
 

Hello,

Finally bought a Nokia N9 from a refurbishing place in China. Not my first choice, but it was the only affordable option. It's running PR1.3 with the 003 region code, and I'd really like to get it back to a fresh state without all the China social network stuff, and *with* the Europe/US services.


I've done a fair bit of reading, and I can find no mention of downgrading except strict statements that say it can't be done. From my understanding, I can go up to 009, but not down to 001. 009 appears to be "Europe (2)", but I am wondering, before I take the plunge:

1) if there's any difference between 001 and 009
2) if there's any chance at all to "downgrade" to 001 (stupid software decision, anyway - makes it seem like some countries are better than others)
3) where to get PR1.3 009 firmware, since even after scouring threads and using the most updated repos I can find (https://silma.tk/soft/ or https://markom.lt/n9/firmwares/) there's no 009 firmwares


alternatively, are there ways to take the firmware version I have and remove the pieces that I don't want?
or, is there a different region I should look at upgrading to? (006 seems to be the highest region I can find firmware for, which is Middle East iirc, and I don't know what effect that will have on anything except Maps/Drive).

Thank you!

Re: Absolutely Positively No Downgrade?
 

Yes, unless you have detailed knowledge (rainisto) and/or access to the tools (of the no longer existing production line).

But regarding your chinese phone see this post:
https://talk.maemo.org/showthread.ph...83&postcount=6

1) no idea but guess just some 'social stuff'
2) no (so make sure you grab also a 003 firmware file, for cmt)
3) use the internet (or possibly some kind member can help out?)

Re: Absolutely Positively No Downgrade?
 

There are two different ways to downgrade a N9 that I know of, but neither is especially easy :D

1.) There's a certain guy in Tampere, Finlad who can do it for you, The downside is you have to travel there and know who to ask for :cool:
2.) If you have (or can get hold of) another N9 which is on lower software leve than your device there is a way to use ubiboot to duplicate the FS of the pristine device to your device :eek:

Re: Absolutely Positively No Downgrade?
 

Downgrading is possible and has been achieved. Check out this post by feuerplatz and read the rest of the thread.

Re: Absolutely Positively No Downgrade?
 

I guess I know who you refer to ;)

Orly, is this tested/confirmed? I guess there might be more info in the not-ubiboot-provided-partitions.

Re: Absolutely Positively No Downgrade?
 

Thanks for reminder! :cool:
So yes, it has been achieved. But it needs detailed knowledge ...

Re: Absolutely Positively No Downgrade?
 

Indeed! As long as it cannot be reliably reproduced I consider this method a vapor case, unfortunately. :(

Re: Absolutely Positively No Downgrade?
 

Yes, you do have a valid point; this method does not downgrade the CAL and CMT. However it does fully downgrade the Harmattan system software which is what most people want. :)

Re: Absolutely Positively No Downgrade?
 

the details are there, and i managed to get thru it all, just needed a specific version of sw - matching the initial certificate, unfortunately i only managed to find that after having sold my devices.
but iam sure it works for downgrading.

Re: Absolutely Positively No Downgrade?
 

If someone made it. Where it be possible to upload the partitions of lower FW to made it possible for all?

Re: Absolutely Positively No Downgrade?
 

sadly no, its device specifik because of certificates.

Re: Absolutely Positively No Downgrade?
 

1) if you have 003 version (china) you cannot flash even 009 version on top if it as chinese cmt cannot be upgraded nor downgraded to any other region than 003. If you have phone that is any other than 003, for example 001 or 005 then you could flash 009. Only thing that you can do is gain all capa access, and manually edit sw and services to match european version.

2) downgrade is only possible if you have working closed mode phone and know how to edit your own phones certificate in a special way (and no you should _not_ use other phones cert like one thread in this forum offers as that can brick your phone if hardware version does not match.) And even then you cannot downgrade CMT, so once chinese version has been flashed then its set forever.

3) you have 003, so 009 is no luck, you can only reflash 003.

Re: Absolutely Positively No Downgrade?
 

So I guess it wouldn't be possible to flash 009 over 003 version and then later just reflash CMT with 003 firmware as described in flashing guide for N9 to make radio work?

Re: Absolutely Positively No Downgrade?
 

Well in theory you can trigger openmode and flash any filesystem (for example 001) that you want, but there might be issues running european sw against chinese cmt. But then again you can in option 1. just gain all capas and replace and resign the software binaries yourself without losing the closed mode.

Re: Absolutely Positively No Downgrade?
 

I did it for 005 over 003. I described it in this post: https://talk.maemo.org/showthread.php?p=1483483#6

Been using it for more than a year now as my main phone in the USA. Works fine. Szydl0 did it too didn't seem to have any problems either and said it worked fine in Europe: https://talk.maemo.org/showpost.php?...78&postcount=7 & https://talk.maemo.org/showpost.php?...26&postcount=9

Re: Absolutely Positively No Downgrade?
 

Thanks rainisto and DA5. So it seems I should be able to normally flash 009 over 003 and then to have radio working again flash just CMT from 003 by using:
And all must have been done in openmode. Am I right? Sorry for stupid questions, but I feel still a beginner in Meego/N9 ;-)

Re: Absolutely Positively No Downgrade?
 

You don't need open mode. Even though 009 should work, I've only tried it with 005 over 003 so you might want to try that first and see if it has what you're looking for. I haven't noticed a difference between my 005 and my girlfriend's 001.

Re: Absolutely Positively No Downgrade?
 

OK, thanks again, I'll try both then as soon as my N9 arrives until I'd just lucky and that would be 001, but I doubt as I've ordered it from China ;-)

Re: Absolutely Positively No Downgrade?
 

What can I do if I have a 339 (Swedish) N9 with PR1.3? I've spent quite some time searching but have been unable to find this firmware, and the 001 version gives "Downgrade disallowed". Only good for the bin?

Re: Absolutely Positively No Downgrade?
 

I do have another N9, which is in closed mode on PR1.3 region 001 - there are hints in this thread that it may be possible to use this to "downgrade" a localised N9 to region 001, but no link to further information. Anyone know where I can read more about this procedure?

Re: Absolutely Positively No Downgrade?
 

Two possibilities:
First one (easy): just grab a 480 (Switzerland) version and flash it.

Second one is: use ubiboot, dump SW from running 001 device and load it to the other device. (never heard that one did/succeeded so, but in theory it should be possible).

Oh and there is another: someone already downgraded by extracting certificates from 001 device (link).

Re: Absolutely Positively No Downgrade?
 

hi!
ok listen you can use this as main.bin but remember you will need to have the chinese main.bin(just get the 003 variant from links you put) too to flash the cmt rfs part to get data working http://www.freeflashfile.com/nokia/B...96/40.2012.21/
also youll need this as emmc.bin
http://yadi.sk/d/nvgsOLgn6zgVW
mirror:
https://yadi.sk/d/jXsOeRUdqKizZ
also all firmware are technically the exact same thing just except for some extra junk apps
and region locked cell networks which youll probably need if you need to use a sim card on your phone unlike me who messed up and now is stuck with a brick that boots and has become technically a pda device :cool: and btw i do NOT recomend doing anything else than a zeroise of the device youre doing this on.

(sorry im just frustrated ):mad:


P.S. whatever you do DO NO INSTALL THE NOKIA LINK UPDATE ON YOUR PHONE it contains a kernel bug that instead of fixing 3g connections just totally screws them over and then the rfs partition ts locked and you can go to hell with your phone but nothing will repair it until we find a fix or something

note: tough this isnt downgrade but this is a way you can have most functionality by keeping on pr1.3 and having european firmware (also if the emmc.bin link dont load up use this https://ultrasurf.us/(assuming you use windows)
see ya!