[Procedure]No HTC unlock HC-GB downgrade for official HC OTA - HTC Flyer, EVO View 4G

This procedure applies to both flyers and view
Required downloads
First download the Gingerbread RUU for your device from this thread.
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
I don't have a simple bundde for Mac, would welcome a link if anyone has one.
Download my universal misc_version and unzip to obtain the misc_version file.
Download tacoroot
Place both the misc_version and tacoroot.bin files in the same directory as adb
Procedure
Check the version number for your gingerbread 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.
Boot your flyer up to android if it's not already on, with usb debugging enabled and connect it to the PC.
Run the following adb commands
Code:
adb push tacoroot.bin /data/local/
adb push misc_version /data/local/
adb shell chmod 755 /data/local/tacoroot.bin
adb shell chmod 755 /data/local/misc_version
adb shell /data/local/tacoroot.bin --setup
At this point your device will reboot to recovery
Simultaneously press Volume Up, Volume Down and Power
Reboot your device
Run the following command
Code:
adb shell /data/local/tacoroot.bin --root
Your device will reboot, do not worry if it does not boot fully, it doesn't matter for this procedure, and it is a side effect of this root exploit.
Run the following command:
Code:
adb shell /data/local/misc_version -s [COLOR="Red"]2.00.405.3[/COLOR]
Note that the number in RED is the version number retrieved in step 1.
Reboot to fastboot:
Code:
adb reboot bootloader
Relock the bootloader:
Code:
fastboot oem lock
Go back to fastboot mode ( lock causes the device to reboot )
Run your RUU ( if on linux or mac, see other similar threads from me on how to RUU on those OSes )
Special Thanks
jcase for the tacoroot.

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s*** too late!!!!
Yesterday I unlocked my Tab via HTC Unlock, hopefully I'll never need the warranty ...
But thanks for your detailed and very helpful instructions in this forum, don't know where I would be without you.

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globatron said:
7. Run the following command:
Code:
adb # /data/local/misc_version -s [COLOR="Red"]2.00.405.3[/COLOR]
Click to expand...
Click to collapse
I think there is a mistake, it should be:
Code:
adb shell /data/local/misc_version -s [COLOR="Red"]2.00.405.3[/COLOR]
But: it doesn't work. The device hangs in the boot process after flashing the RUU.

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Tutmanichtun said:
I think there is a mistake, it should be:
Code:
adb shell /data/local/misc_version -s [COLOR="Red"]2.00.405.3[/COLOR]
But: it doesn't work. The device hangs in the boot process after flashing the RUU.
Click to expand...
Click to collapse
The typo correction is correct but that it doesn't work is not. I've done this multiple times with both my own and other peoples devices and it works just fine. Make sure you used a gingerbread RUU and the it flashed completely. AND that you not doing this on an S-OFF device.

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globatron said:
AND that you not doing this on an S-OFF device.
Click to expand...
Click to collapse
Thats the fault. My Flyer is S-OFF. Is there a possibility to get back to GB anyway?
Edit: Found a Solution. It cost me the whole day, but now it works.
The bad note: I don't know the Link with the solution. But it was in this Forum.
I got to it by Flashing a 3.2.1 ROM, and after that a 2.3.4 ROM via Goldcard-Method. (Via the SD-Card.)
During the process the Bootloader creates a message, that the installed hboot version isn't downgradeable or something like that. I hacked that into Google and it throws out a Thread in this Forum with the Solution.

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Might be a little off topic, but the title:
[Pocedure]No HTC unlock HC-GB downgrade for official HC OTA
"[Pocedure]" is missing a letter r

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echaru said:
Might be a little off topic, but the title:
[Pocedure]No HTC unlock HC-GB downgrade for official HC OTA
"[Pocedure]" is missing a letter r
Click to expand...
Click to collapse
Cool. someone who actually reads
Thanks echaru, fixed.

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Im on the HC leak - can I use this method flash the RUU for US WIFI HC Release or do I need to go back to GB first?

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Back to gingerbread I believe is your only option
Sent from my HTC Flyer P510e using xda premium

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mcord11758 said:
Back to gingerbread I believe is your only option
Sent from my HTC Flyer P510e using xda premium
Click to expand...
Click to collapse
That's Correct.

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Tutmanichtun said:
Thats the fault. My Flyer is S-OFF. Is there a possibility to get back to GB anyway?
Edit: Found a Solution. It cost me the whole day, but now it works.
The bad note: I don't know the Link with the solution. But it was in this Forum.
I got to it by Flashing a 3.2.1 ROM, and after that a 2.3.4 ROM via Goldcard-Method. (Via the SD-Card.)
During the process the Bootloader creates a message, that the installed hboot version isn't downgradeable or something like that. I hacked that into Google and it throws out a Thread in this Forum with the Solution.
Click to expand...
Click to collapse
What you say does not make sense to me. This thread specifically says this is for official HC upgrade which implies you have to be S-ON and locked.
If you are S-OFF you need to follow Globatron's other thread http://forum.xda-developers.com/showpost.php?p=19607833&postcount=3

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cnewsgrp said:
What you say does not make sense to me. This thread specifically says this is for official HC upgrade which implies you have to be S-ON and locked.
If you are S-OFF you need to follow Globatron's other thread http://forum.xda-developers.com/showpost.php?p=19607833&postcount=3
Click to expand...
Click to collapse
Thats what I said: I've made a mistake.

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hi
I try this method ... but something is wrong
adb push msc_version /data/local
error : cannot stat msc_version : No such file or directory
your file is misc_version
rename misc_version to msc_version? or ?!
plz help

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nader1450 said:
hi
I try this method ... but something is wrong
adb push msc_version /data/local
error : cannot stat msc_version : No such file or directory
your file is misc_version
rename misc_version to msc_version? or ?!
plz help
Click to expand...
Click to collapse
Typo in the procedure, fixed now.

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Hi
I followed the instruction and at this point:
adb shell /data/local/misc_version -s 2.00.405.3
I have a message: error opening input file.
I assume it is for the RUU.. where do I need to copy the RUU file to my SD or to the same folder where ADB is?

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That is not the ruu. It is the misc file and all files should not be on your ad unless you are trying to flash the zip through hboot. They should be in your adv folder
Sent from my HTC Flyer P510e using xda premium

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mcord11758 said:
That is not the ruu. It is the misc file and all files should not be on your ad unless you are trying to flash the zip through hboot. They should be in your adv folder
Sent from my HTC Flyer P510e using xda premium
Click to expand...
Click to collapse
Thx for your answer. I have the misc file in the ADB folder the sameone I downloaded from the instruction.. any other idea?
Right the whole message is after I enter the command:
Finding misc partition
misc partition found: /dev/block/mmcblk0p28!
backing up misc partition to /data/local/miscBackup-1325954343.bin and determing
version length...
Error opening input file.

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You failed to get root with tacoroot.
Start again from the last command in step 3.

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globatron said:
You failed to get root with tacoroot.
Start again from the last command in step 3.
Click to expand...
Click to collapse
I think this would be the problem then after i run this:
C:\Android>adb shell /data/local/tacoroot.bin --root
Rebooting into root.
cannot create /data/local.prop: permission denied

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globatron said:
Type in the procedure, fixed now.
Click to expand...
Click to collapse
thanks
i try again ... but:
adb shell /data/local/misc_version -s 2.27.707.1
have error (i don't remember error but something like that): misc only 11 number but this is 10
any way, restart and come htc boot and didn't go to android.
i flash HC ... and go to android ... but adb cannot connect device
error is: devices not found
i try:
adb kill-server
but still problem
plz help me