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Thread: Downgrade to 902 - No app or data loss

  1. Senior Droid
    master0fursinz's Avatar
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    Awesome work Sam. This will make it real easy to update and never lose data again. Unless you fry your phone. If thats the case is there a program or app to copy your phone and save it on the computer like that ugly idevice
  2. Developer
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    I regularly backup my internal and external sdcards to my pc.
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    Wow! Script that creates a bootimg patch. Sam your creative skills are genius! Im going to have to study up on that process so i know what is going on under the skin.
  4. Developer
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    Quote Originally Posted by unchoney View Post
    Wow! Script that creates a bootimg patch. Sam your creative skills are genius! Im going to have to study up on that process so i know what is going on under the skin.
    I can explain to the class so everyone knows.

    1) we scan all the directories for a Blur_Version update zip that doesn't have a corresponding boot.img
    2) we extract the patch/boot.img.p and the recovery/etc/install-recovery.cfg files
    3) we read in the install-recovery.cfg file to get the sha1 hash and the size of the boot.img that we're creating
    4) we push 905's boot.img and the boot.img.p to the /data/local/tmp folder on your phone
    5) using the sha1 and boot img size we got from the cfg combined with the known sha1 hash for the 905 boot img, we run the applypatch command to create the new boot img
    6) we pull it from the /data/local/tmp folder
    7) clean up the /data/local/tmp folder and the boot.img.p and install-recovery.cfg files
    8) done
  5. Junior Droid
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    Is there anything that checks the security level to make sure it is the same? I am brave but I think ill wait till the experts verify the security level.( I was one of the first who found 235 and installed it before anyone had a chance to check it out). Thankfully we have a dev community that rescued us!
  6. Developer
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    Yes. In the utils dir you'll find Skrilax_CZ's CDTParser.exe. What you do for that is extract the cdt.bin from the version you're on (let's say 235) and then extract the cdt.bin from the version you're going to (let's say 238), open 2 instances of CDTParser.exe, and open each cdt.bin. Now compare. You want to not only check the cdt.bin version at the top, but, also the security on each partition. If they match, good. If there is an increase, bad.
  7. Developer
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    (P.S. You didn't wait for me to perform that check before you jumped....I was still downloading when you said "aw screw it I'm installing....20 minutes later I came back and said "hey, guess what, new security." )
  8. Junior Droid
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    Oh for sure it was my decision to jump ahead...my eagerness got the best of me...you have certainly covered all the bases! I really find all this fascinating.. if I were much younger id probably pursue further education. Probably wouldnt mind getting into the developer area except never enough time as there is(wife already jealous of time i spend on it!)
  9. Developer
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    Well, hopefully with this latest release, the time I have to spend on it will be MUCH lower now. I finally got it to a point where I'm happy with it. It should do what everyone needs now. I can focus on bug fixing if any come up and relaxing and waiting for updates like everyone else.
  10. Senior Droid
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    I have thoroughly enjoyed reading and learning the many new things you have put out there in the last couple of days! Your tutorial in the OP has become clearer and is much appreciated. I have easily gone from.235 to .238 by following the great
    SAMURI !!
    spending way too my time with my BIONIC

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