[HOW-TO] downgrade HBOOT 0.92 to 0.80 again

Sammy83 · Aug 5, 2010

!!!! ROOTING/FLASHING/DOWNGRADING IS ALWAYS ON YOUR OWN RISK !!!!
Attention: This method will completely wipe your phone!!!

You can find the reworked Tutorial here: http://android-tutorials.org/
Video of the first step is online: Step 1

Video of the 3 & 4 step is online: Step 3 & 4

Known Problems
If you have problems while re-rooting or custom recovery (unrevoke) try to downgrade again with the above procedure.
Make sure you have made a new goldcard.
If you have problems e.g. 140 ERROR please follow these instructions (thx to raz2133)
This will fix your MISC Partition so you can flash back original RUU files.

Happy re-rooting

P.S. i hope you can understand this because english is not my foreign language

xtcislove · Aug 5, 2010

Great News!

Im not Root-Bricked ^^ but someone else will be happy with it =)

Edit: Why is 1 Pic from July and one from March!? And different times.

rvdgeer · Aug 5, 2010

Thank you!!!
Maybe you should add: this wipes your device...

Nitrius · Aug 5, 2010

This is great, keep up the good work! =)

Edit: Are we sure those that do not have a carrier locked/branded also needs to create a goldcard?

Sammy83 · Aug 5, 2010

Nitrius said:
This is great, keep up the good work! =)

Edit: Are we sure those that do not have a carrier locked/branded also needs to create a goldcard?

Not sure about that. i had a branded Vodafone version and unbranded it.
If someone could try without goldcard and report here

sorch · Aug 5, 2010

xtcislove said:
Edit: Why is 1 Pic from July and one from March!? And different times.

That was when the bootloader was built, not the current time.

xtcislove · Aug 5, 2010

sorch said:
That was when the bootloader was built, not the current time.

Ah thanks ! Dont know this =)

murrelito · Aug 5, 2010

I hope this will work on generic devices that are not branded...

SharpSA · Aug 5, 2010

Sammy83 said:
For everyone how was in bad luck and updated to the original OTA FroYo here is a way how you can revert it.

The User maximini1 has found a thread where they describe how you can downgrade to 0.80 again.

So i try to explain how you have to do it.

Preparation
1. Make a NEW Goldcard (here)
2. Download PB99IMG.zip (here - MIRROR - germany MIRROR2)
3. Rename the downloaded file to "PB99IMG.zip" and copy it onto your SD Card.

Flashing
1. Shutdown yor mobile
2. Hold Volume up and press power
3. wait until PB99IMG.zip was found and checked
4. Press Volume Up <yes> - PICTURE 1
5. Wait until all steps are done. DON't POWER OFF YOUR DEVICE!!! - PICTURE 2
6. After flashing press Volume Up to reboot
7. done

Happy re-rooting

Is it working? Did try anyone?

Nitrius · Aug 5, 2010

Sammy83 said:
Not sure about that. i had a branded Vodafone version and unbranded it.
If someone could try without goldcard and report here

Looks like it's possible for those with an unbranded/unlocked phone:

mbroeders said:
First of all, I have an unbranded simlock-free phone. All I did was
1. download the file to SD card.
2. rename to PB99IMG.zip
3. boot into recovery (turn phone on while holding down volume)
4. just let it load the zip file and press yes when asked to install

Easy as that!

Sammy83 · Aug 5, 2010

SharpSA said:
Is it working? Did try anyone?

Yes working 100%

Wheezy_be · Aug 5, 2010

Ok, I never rooted my android before and I have the OTA 2.2 Froyo update on an unbranded Desire. After I complete these steps, what do I need to do to install a custom rom?

Thanks!

Nitrius · Aug 5, 2010

Wheezy_be said:
Ok, I never rooted my android before and I have the OTA 2.2 Froyo update on an unbranded Desire. After I complete these steps, what do I need to do to install a custom rom?

Thanks!

Root your phone with unrevoked, using on of these guides for example:
Linux:
http://myhtcdesire.com/modding/how-to-root-your-desire-easily-method-1
Windows:
http://myhtcdesire.com/modding/how-to-root-your-desire-easily-method-2

u9dbg · Aug 5, 2010

Ok for the dumb and ignorant among us (a.k.a me) what state does this leave your phone in.

I get I downgrade HBOOT to 0.80 and my phone will be wiped, but what ROM will be on the phone after the downgrade will it still be the OTA rom or will it be another one?

Or do I then need to install a ROM of my choice after the downgrade, sorry if this is a really stupid question, I haven't put any custom ROM on my Desire yet and then I got the OTA update as I was thinking about checking out some custom stuff. Not had the phone long.

Thanks.

{EDIT} someone beat me to it as I was typing this post thanks for the above!

Sammy83 · Aug 5, 2010

u9dbg said:
Ok for the dumb and ignorant among us (a.k.a me) what state does this leave your phone in.

I get I downgrade HBOOT to 0.80 and my phone will be wiped, but what ROM will be on the phone after the downgrade will it still be the OTA rom or will it be another one?

Or do I then need to install a ROM of my choice after the downgrade, sorry if this is a really stupid question, I haven't put any custom ROM on my Desire yet and then I got the OTA update as I was thinking about checking out some custom stuff. Not had the phone long.

Thanks.

After you've done the steps above you will have the following:

Blank and wiped device
Firmware: 2.1-update1 UNROOTED!
HBOOT: 0.80
Basband(Radio): 32.36.00.28U_4.06.00.02_2
Kernel: 2.6.29-0cb9f166htc-kernel@18-2#1
Build: 1.21.405.2 CL174215 release-keys

With that you can root and flash anything you want

gloom · Aug 5, 2010

Thanks for the tuto.
Hello sweety 0.80, bye bye dirty 0.92 ^_^

Worked for me.

Btw, didn't need the gc

pexon · Aug 5, 2010

Well, if this works AdamG doesn't have to find a way to root hboot 0.92.
:/

Sent from my HTC Desire using XDA App

Jitsufreak · Aug 5, 2010

Has anyone tried this on a branded, but rooted phone?

I've got an O2 branded desire with hb00t 0.83, I can root with unrevoked, but can't boot into recovery =( Hoping this will fix it.

atesszan · Aug 5, 2010

It's works fine! Why doesn't work the recovery bat. on my PC?

gascanieto · Aug 5, 2010

u9dbg said:
Ok for the dumb and ignorant among us (a.k.a me) what state does this leave your phone in.

I get I downgrade HBOOT to 0.80 and my phone will be wiped, but what ROM will be on the phone after the downgrade will it still be the OTA rom or will it be another one?

Also for me, it's Volume Down + Power

[HOW-TO] downgrade HBOOT 0.92 to 0.80 again

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