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Get Fastboot and adb for linux here
The version is the part highlighted in red.
adb shell /data/local/tacoroot.bin --setup
At this point your device will reboot to recovery
ProcedureCheck the version number for your gingerbread RUU

Code:
Download tacoroot
Boot your flyer up to android if it's not already on, with usb debugging enabled and connect it to the PC.
var sidebar_cookie = jQuery.cookie('xda_sidebar_visible');
//}
adb reboot bootloader
Relock the bootloader:
adb shell /data/local/misc_version -s 2.00.405.3
Code:
[Procedure]No HTC unlock HC-GB downgrade for official HC OTA
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.
fastboot oem lock
jcase for the tacoroot.
//console.log('Window Width: '+ jQuery(window).width());
Code:
Run the following command
adb push misc_version /data/local/
adb shell /data/local/tacoroot.bin --root
Reboot your device
adb push tacoroot.bin /data/local/
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
adb shell chmod 755 /data/local/misc_version
Code:
Simultaneously press Volume Up, Volume Down and Power
Run the following command:

If you don't have adb and fastboot on your PC Get fastboot and adb tool for windows here
Reboot to fastboot:
Required downloadsFirst download the Gingerbread RUU for your device from this thread.
Place both the misc_version and tacoroot.bin files in the same directory as adb
Go back to fastboot mode ( lock causes the device to reboot )
Run the following adb commands
Code:
Note that the number in RED is the version number retrieved in step 1.
adb shell chmod 755 /data/local/tacoroot.bin
//if (jQuery(window).width() < 1247 || sidebar_cookie == 'false') {
Run your RUU ( if on linux or mac, see other similar threads from me on how to RUU on those OSes )
I don't have a simple bundde for Mac, would welcome a link if anyone has one.
This procedure applies to both flyers and view
Special Thanks
Download my universal misc_version and unzip to obtain the misc_version file.

7. Run the following command:
Code:
adb # /data/local/misc_version -s 2.00.405.3
I think there is a mistake, it should be:
Code:
adb shell /data/local/misc_version -s 2.00.405.3
But: it doesn't work. The device hangs in the boot process after flashing the RUU.

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

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.

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?

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
Cool. someone who actually reads
Thanks echaru, fixed.

var sidebar_cookie = jQuery.cookie('xda_sidebar_visible');
//console.log('Window Width: '+ jQuery(window).width());
//if (jQuery(window).width() < 1247 || sidebar_cookie == 'false') {
googletag.cmd.push(function() { googletag.display('div-gpt-ad-2864076999006-7'); });
//}
[Procedure]No HTC unlock HC-GB downgrade for official HC OTA
This procedure applies to both flyers and view
Required downloadsFirst 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
ProcedureCheck 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 2.00.405.3
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.

Back to gingerbread I believe is your only option
Sent from my HTC Flyer P510e using xda premium
That's Correct.

I think there is a mistake, it should be:
Code:
adb shell /data/local/misc_version -s 2.00.405.3
But: it doesn't work. The device hangs in the boot process after flashing the RUU.
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.

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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