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Downgrade from HC beta leaks or official HC OTA to Gingerbread.

OP globatron

16th February 2012, 02:31 AM   |  #201  
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Thanks Globatron, I will work thru that easy install guide again.

Thanks

Sent from my HTC_Flyer_P512_NA using Tapatalk
Last edited by glparke; 16th February 2012 at 02:38 AM.
16th February 2012, 03:49 AM   |  #202  
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Quote:
Originally Posted by globatron

If you followed the easy install guide then you want to follow this this post

Please see THIS THREAD before doing this procedure, you might be able to avoid using the HTC unlock.


WARNING: This procedure applies to flyers (not View) only and should be used only if you get the following message when trying to downgrade:


"Main Version is older! Update Fail! Press <POWER> to reboot"

If you upgraded to HoneyComb using the Official OTA perform these steps, otherwise skip to section "Downgrade" below

  1. Perform a HTC unlock using the HTC unlock website
  2. Download this recovery download MD5: bb366b025dcc454ffe8b21b8bf0c72d0
  3. Download superuser from here
  4. Copy the su zip file to the root of your external SD card.
  5. Boot the flyer to fastboot mode
  6. Flash recover
    Code:
    fastboot flash recovery recovery.img
  7. Reboot to recovery and install the su zip file.
  8. Reboot to android
  9. Proceed with the downgradre procedure below.

Downgrade
  1. First download the RUU for your device from this thread.

    If there is no RUU for your region/operator, download one of the unbranded ones and create a goldcard
    If you don't know which RUU to use see post #2.

  2. Download misc_version_universal.zip and extract the misc_version file from it.

  3. If you don't have adb and fastboot on your PC
    • Get fastboot and adb tool for windows here

    • Get Fastboot and adb for linux here

  4. check the version number for your RUU
    In my example I am using this RUU: RUU_Flyer_HTC_WWE_2.00.405.3_R_Radio_20.3501.30.08 9BU_3809.05.04.10_M_release_194964_signed.exe
    The version is the part highlighted in red.

  5. Boot your flyer up to android if it's not already on, with usb debugging enabled and connect it to the PC.

  6. Run the following command:
    Code:
    adb push misc_version /data/local/misc_version
  7. Run the following commands:
    Code:
    adb shell 
    $ su     (make sure your screen is unlocked so you see a toaster notification if it appears)
    # chmod 777 /data/local/misc_version
    # /data/local/misc_version -s 2.00.405.3
    Note that the number in RED is the version number retrieved in step 4.
    You will see a message about backing up and writing misc partition

  8. Reboot to fastboot:
    Code:
    adb reboot bootloader

  9. Relock the bootloader:
    Code:
    fastboot oem lock


  10. Run your RUU

If you have correctly completed the process you will no longer get the "Main Version is older! Update Fail! Press <POWER> to reboot" message and you will be able to downgrade to GingerBread.


Note: By choosing an appropriate value for the version it is also possible to return to a specific operator ROM if you have previously upgraded with a goldcard and you have a suitable original RUU. If using the procedure for a downgrade within gingerbread you must first root the flyer and skip step 8. For example you can downgrade from a WWE RUU to an O2 RUU.

Special Thanks
Alastor_ru for testing this procedure for me.
Grkdotnot and RMarkland for testing the procedures for BestBuy Flyers

Donations
lpasq, RMarkland - Many thanks for the contributions; your donations will be used to facilitate the search for full S-OFF.

For support please join the IRC channel #flyer-downgrade on freenode. If you don't have an IRC client you can use the following link #flyer-downgrade


tks for your great post! i can downgrade my SEA Flyer now
The Following User Says Thank You to trungvn1790us For This Useful Post: [ View ]
16th February 2012, 06:19 PM   |  #203  
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Quote:
Originally Posted by trungvn1790us

tks for your great post! i can downgrade my SEA Flyer now

Please edit your post and remove the quotation of the entire first post, it traps information that might be out of date in the future in the thread.

Thanks
-globatron
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19th February 2012, 01:50 AM   |  #204  
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I am still getting stuck somewhere with the downgrade from HC to GB. I am S-off with revolutionary recovery.
I followed post 3 in the Easy Install post as mentioned here
I copied my GB RUU into the fastboot directory and got to this

fastboot erase cache
fastboot oem rebootRUU

but after 12 minutes of it sitting in the black screen with the HTC on it, and no progress bar, I tried the flash PG41IMG-WIFI.zip command. and that gave me an error of unknown partition, cannot determine image filename. Do I need to rename that as well to PG41IMG.ZIP to make that work?

Also do I need to copy in the full name of my RUU or rename it in my fastboot folder to RUU.exe? I didn't know if that oem rebootRUU command would just do the RUU in the folder regardless of the name.


Thanks!
(trying not to crap out my flyer!)
Last edited by glparke; 19th February 2012 at 01:53 AM.
19th February 2012, 02:15 AM   |  #205  
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run the commands *excatly* as written with *exactly* the files specified. You can't do a pick and mix from different procedures.

You're not even in the right thread if you're posting in this one.
19th February 2012, 02:30 AM   |  #206  
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First line of this thread takes me to post 3 of your easy install HC method which is what I followed to try and downgrade again. Probably should have posted this question there?
I copied and pasted the commands into my command prompt with my GB Ruu and that wifi zip file in my fastboot folder.
How long does our take to run that Ruu before I need to run the Ruu.

Thanks

Sent from my HTC_Flyer_P512_NA using Tapatalk
19th February 2012, 02:36 AM   |  #207  
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There is no waiting between commands, when you can run a command at the command line you do. The error about the partition you saw was becasue you didn't enter the command correctly.
22nd February 2012, 10:21 AM   |  #208  
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Worked Great!!!!!!!!!!! Thank you guys for all your help and write ups!!! But i cannot make recovery backups because the bootloader is now locked again correct?
23rd February 2012, 09:31 AM   |  #209  
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German Firmware HTC-Flyer
Hello,

i want downgarde my htc Flyer to OTA, which Firmware ist the correct.


stephan
3rd March 2012, 11:12 PM   |  #210  
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Question
Delete this post.... its useless!
Last edited by zummer22; 6th March 2012 at 06:12 PM.

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