[HOWTO] Downgrade Froyo (2.2) to Stock 2.1 (ANY HBOOT | WIN/LINUX/MAC | ROOT)

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klnigam

Member
Feb 23, 2009
27
0
Hi,

Even I am getting this error of "Dvice not found". Any work anound to get it rectified will be appreciated.

Pushing recovery image to the sdcard.
Press n and enter to skip this stage, or just press enter to continue:
Beginning transfer. This may take a minute or two...
1434 KB/s (144182346 bytes in 98.158s)
1 KB/s (54 bytes in 0.044s)
Now verifying the downgrade file.
Downgrade file passed verification.

Obtaining root access.
Please wait a moment.
Done.

* daemon not running. starting it now *
* daemon started successfully *
error: device not found

error: device not found

Kunal
 

eddy790

Member
Oct 19, 2009
34
0
hi..
i`m in malaysia. i want to unroot my desire. this is the 10 times i try but still CID in

correct even i already 4 times make a gold card.

PVT Ship S-on
hboot 0.93.0001
microp-051d
touch panel-synt0101
radio 5.11.05.27

CID incorrect!

plz help me
 

golightlygl

Senior Member
Dec 12, 2008
285
29
London
Can't get beyond Hboot after downgrade

OK, I'm not a noob but neither am I an expert and I have now got myself into a terrible pickle.

After running this tool, I have now unrooted and S-Ond my device so that HBOOT shows:

Bravo PVT1 SHIP S-ON
HBOOT-0.930001

However, I cannot load RECOVERY from HBOOT and neither can I boot into the ROM. I ahve tried both flash methods to put on a stock rom with the same radio as reported by my HBOOT,

RUU works successfully in flashing.

PB99IMG unpacks with all OK and completes the update.

But on reboot, I get stuck at the splash screen (white screen with green HTC logo) which then bootloops about every 90 seconds. I cannot select Recovery. I can select Bootloader and perform some basic Fastboot commands, but now I am S-On again, I cannot even reflash a new recovery.

I cannot ADB into the machine so can't re-root using unrevoked or any other method I've seen here to gain root back to try and do stuff again

At the moment I have a very expensive lump of useless electronics and have spent a huge amount of time researching (including most of this thread) to try and find a solution. Any assistance would be greatly appreciated.
I attach an output of fastboot diagnostic in the hope that will help.
 

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Geeum

Member
Jun 18, 2008
41
0
Guys, I tried to download the downgrade utility but after following the link the md5sum is wrong, the file is corrupted. Tried all download links. What am I doing wrong ?

Geeum
 

jerrol

Senior Member
Jan 29, 2009
115
6
can i use this tool even if i am rooted? in order to downgrade my HBoot and unroot
 

urmish101

Senior Member
Aug 22, 2010
50
2
Surat
hi my desire is a T-mobile so i made a gold card, with this card my phone says safe to remove sd card... is this normal?
now i tried to run the utility but it was not able to send the downgrade rom to sd card
it says failed to copy file : permission denied..

and i cant access my sd card with card reader too! what should i do?

Edit : problem solved
used the PB99IMG.zip placed it on other sd card(not gold card) then from HBOOT updated that is downgraded by myself as this Desire was factory S-off...
but thanks anyways...
 
Last edited:

crisagatie

Senior Member
Dec 14, 2009
248
96
Bucharest
Hi Teppic! Do you think there is a chance to update this tool to downgrade Desire from official Gingerbread to Froyo? I was fool enough to install official RUU and now I lost root, s-off, everything. I'm stuck with a stock phone, no memory for programs, miss my custom cm7 rom :(.

Best regards,

Cristi
 

trancephorm

Senior Member
Dec 14, 2010
51
2
After having much trouble with various RUUs and USB error 170 and 171, this finally works for me... I succesfully downgraded CyanogenMod 7.0.3 with AlphaRev-X S-OFF ... I have Windows 7 64-bit with HTC Sync 2.0.40
 

HappoMatka

New member
Dec 30, 2009
2
0
Helsinki
Unrooted

Thank you for this guide. Now I can get my Desire serviced.

Just had to install stock Froyo 2.2 before this worked.

Everything is working just great, HBoot was 0.93 and now 0.83.
 
Last edited:

dj_aleks

Member
Dec 3, 2008
36
0
Are the download links in the first post broken? tried every one of them without being able to download?!
 

name.vic

Senior Member
Apr 24, 2011
92
10
Hi
I have a problem, i have slcd brick.
I tried to downgrade, but it stuck on this
Android 2.2 (froyo) to 2.1 downgrade utility
============================================
v2.3b

For more information, see thread:
http://forum.xda-developers.com/showthread.php?t=768256


Press ctrl-c to exit this utility.

Waiting for device. Ensure USB debugging is enabled.
* server not running *
* daemon not running. starting it now *
* daemon started successfully *

What i do wrong?

Thanks
 

ZaLiTHkA

Senior Member
Jan 14, 2008
940
133
HTC One (m7)
Xiaomi Mi Mix 2
Hi
I have a problem, i have slcd brick.

Do you mean your screen is dead? Have you tried this yet?

Further Information

Recovery from broken screen

If you have previously run an RUU or tried an older downgrade method and your SLCD phone's screen is now disabled, the easiest way to recover is to run the official froyo RUU to upgrade. You can then either stick with official froyo, or downgrade to a working Android 2.1 release using this tool.
 
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ZaLiTHkA

Senior Member
Jan 14, 2008
940
133
HTC One (m7)
Xiaomi Mi Mix 2
Yes. ANd yes, i got error 131 Customer ID error

Hmm... Ok, two ideas here:

1: Goldcard
If you have one, put it in your device and try flash the stock RUU again. This is probably the easiest method for getting around CID errors.

If you don't have one yet, you can create one with this guide.

2: Downgrader HBOOT
From the Alpharev website, download the 'downgrader' HBOOT, make sure it's named PB99IMG.zip (name is case sensitive), copy it to the root of your SD card, and boot your phone into bootloader.

When you load the bootloader, obviously you won't be able to see what you're doing, but here's a basic idea of how to do it blind:
  • Load bootload: hold volume down and press power
  • Wait approx 30 seconds
  • Press volume up once, this selects to install the HBOOT

If this either confuses you or doesn't seem to work, try use the command prompt method explained on the Alpharev website (below the HBOOT table).
 
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name.vic

Senior Member
Apr 24, 2011
92
10
Hmm... Ok, two ideas here:

1: Goldcard
If you have one, put it in your device and try flash the stock RUU again. This is probably the easiest method for getting around CID errors.

If you don't have one yet, you can create one with this guide.

Can i use GoldCardTool_0.0.5 ? I already created with this tool goldcard

Via fast boot i got
C:\android-sdk-windows\tools>fastboot flash hboot bravo_downgrade.img
sending 'hboot' (512 KB)...
OKAY [ 0.086s]
writing 'hboot'...
(bootloader) signature checking...
FAILED (remote: 12 signature verify fail)
finished. total time: 0.142s
 
Last edited:

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    *Please note: this utility may not function with some very new froyo releases (e.g. the ARA release) and almost certainly will not work on the official gingerbread release*

    This utility will quickly, safely and easily downgrade froyo to stock Android 2.1 (HTC software version 1.21.405.2, radio 32.41.00.32U_4.08.00.09, hboot 0.83), which can then be rooted with unrevoked3. The downgraded ROM is fully compatible with SLCD and AMOLED screens.

    You do not have to downgrade to Android 2.1 with the supplied stock ROM. After the process is completed, just cancel the flash and install the ROM you require using the standard RUU method (this utility will prevent the version error you normally get when trying to install an older release).

    In other words, some typical uses:

    - You have installed an update and want to revert to an older version.
    - You have rooted your phone and want to return it to stock (e.g. for warranty or selling).
    - You want to debrand your phone, or you have debranded and want to re-brand it.

    It runs in Linux, Mac OS X and Windows. Please post your results, even if successful and without any problems. If unsuccessful please post the output from the utility and include which version your phone was currently on (e.g. 2.09.405.8 / hboot 0.92) and the CID that the utility gives you (e.g. HTC__001). If the utility reports that it has failed to root your phone, no harm will be done so long as you stop the process.

    Update:
    Newer versions of unrevoked3 (from 3.21) can now root froyo ROMs directly, and a downgrade is no longer necessary if you just want to root and install custom recovery, although there appear to be a few issues. If you want to rebrand/debrand your phone, rooting won't achieve this and you can use this method instead. If you cannot get the new version of unrevoked3 to work you can also run this and use the older version (3.14) that works with Android 2.1.

    Requirements

    A working goldcard if your phone is or was branded.
    At least 150mb free on your sdcard/goldcard, formatted as FAT32.
    Downgrade Utility (v2.3) - Alternate Link
    md5sum: f558a157e154e47331da67aa3c3d0a8b
    [Downgrade utility (v2.1) - Alternate Link]
    md5sum: 9b218e68068e77840d91c9d5edbf32ac

    Process

    Previous froyo downgrade options are not really adequate for these reasons:

    - They result in a broken screen on SLCD phones.
    - They do not run at all on software versions higher than 2.09.405.8.
    - They involve manually copying files and manual post-downgrade steps.

    This downgrade has none of these problems, and will work on SLCD and AMOLED phones and any version of HBOOT.

    The process is simple and requires minimal intervention - just a couple of key presses. A few reboots will take place as it flashes the downgrade, and this is nothing to worry about.

    You can run this utility on Android 2.1 too. If your phone is rooted or has a custom ROM, it will be restored to a stock unrooted ROM.

    This downgrade is not suitable for CDMA phones.

    Further Information

    If you want to flash an alternative RUU (e.g. a branded 2.1 release), just skip the downgrade section at the end by pressing vol-down on the phone when the utility has completed. Then reboot the phone and run the RUU you want. If you have an SLCD screen you should be very careful here - most older RUUs don't support the screen.

    If you want to run a custom ROM you need to apply the downgrade, and then root the phone using unrevoked3.

    On some sdcards the phone might not detect the downgrade file (this is nothing to do with this utility, and it will not harm your phone). If this happens, trying a different card or re-formatting it as FAT32 will probably fix it. Otherwise you can install the same downgrade image directly using this RUU. Note that you can only apply this RUU after running the utility, and it is only necessary if the phone does not detect the downgrade at the final stage.

    Linux/Mac Installation

    1. Download and extract the utility in a terminal:
    $ unzip downgrade23.zip
    $ cd desire_downgrade

    2. Enable USB debugging on your phone. Ensure 'ask me' is set under 'Connect to PC' setting, and 'charge only'. Plug in your phone.

    3. Run the utility.
    $ sudo ./downgrade.sh

    4. Wait for the process to complete.

    If you chose not to downgrade, you can now flash any RUU.

    Windows Installation

    0. Install HTC Sync (driver required).

    1. Extract the downloaded zip file fully (do not just click on the zip file).

    2. Enable USB debugging on your phone. Ensure 'ask me' is set under 'Connect to PC' setting with 'charge only'. Plug in your phone.

    3. Double-click on the win-down file.

    4. Follow instructions and wait.

    Notes - Please Read

    You should remove the PB99IMG.zip file from your sdcard after completing.
    This process will wipe all the data from your phone (except the sdcard).
    The downgrade will work on branded phones only if a goldcard is inserted (without one: CID error).
    The process will flash your recovery partition back to stock.
    The downgrade installs an official (unbranded and unrooted) stock HTC ROM.
    The downgrade does not depend on any version of HBOOT.
    If the bootloader cannot find the PB99IMG file, try formatting the sdcard as FAT32 and try again.

    Thanks: 743C ([email protected]) for local root exploit.

    __________________________
    If this has helped you, maybe buy me a beer?
    2
    Current version: 2.3

    Known bugs:

    Some newer phones may fail to downgrade properly with an error during the flashing process. If this happens, try installing one of the latest stock RUUs to recover.

    Further Information

    Backups

    Downgrading requires a full factory reset, which is automatically performed as part of this process. There are various apps to help with backing up data from your phone. For example, 'SMS Backup & Restore' is a simple app that will back up your text messages to your sdcard and let you recover them later. You can back your contacts up using the People app (menu, and then 'export to SD card').

    Recovery from broken screen

    If you have previously run an RUU or tried an older downgrade method and your SLCD phone's screen is now disabled, the easiest way to recover is to run the official froyo RUU to upgrade. You can then either stick with official froyo, or downgrade to a working Android 2.1 release using this tool.

    Other HBOOT?

    You do not need a lower version, and installing a lower one will break SLCD phones. See this thread for information about this.

    Reporting problems

    Please include as much detail as you can, with at the very least any errors given by the utility. Also include the CID provided by the utility.

    Changelog

    2.3 - 05/09/2010
    Fix testing bug in Linux/Mac version.
    No changes to Windows version.

    2.2 - 02/09/2010
    Add OS X support.
    Explicitly use bash (Mac compatibility)
    Check for root on Linux/Mac

    2.1 - 01/09/2010
    New: goldcard requirement check.
    Wait on phone instead of check for phone.
    Move all file checks to phone.
    Cleanup files on completion.

    2.0 - 30/08/2010
    Major reworking.
    CID/misc partition handled automatically.
    Verify misc partition image and downgrade image after transfer.
    Check root access improved.
    Various clean-ups.

    1.3 - 30/08/2010
    Linux: integrate misc partition image creator.
    Sync transfers for extra reliability.
    Use old-style sdcard location for Android 2.1 compatibility.
    Various minor changes.

    1.2 - 29/08/2010
    Fix mtd0 backup error.
    Backup mtd0 to sdcard instead.
    New: Windows get-cid script.

    1.1 - 29/08/2010
    Windows script checks for PB99IMG.zip
    Checks if the phone is already running a rooted ROM. If it is, the downgrade can now safely be performed.
    Creates a backup of the existing misc partition.

    1.0: Initial public version - 29/08/2010

    Testing Status

    No known problems. Tested on several ROMs included stock unbranded Froyo (2.09.x, 2.10.x) and O2 and Vodafone branded Froyo.


    __________________________
    If this has helped you, maybe buy me a beer?
    https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=H7CWV8KN4TLVY
    2
    Downgrade v2.3.zip
    http://db.tt/IikgVSN8

    Htc Desire & AOKP by Preston74
    2
    What would be the best thing to try now? Here are the phone details:

    BRAVO PVT1 SHIP S-ON
    HBOOT-0.93.0001
    MICROP-031d
    TOUCHPANEL-SYNT0101
    RADIO-5.11.05.27

    ANDROID 2.2
    BUILD 2.33.161.2

    It has CWM recovery on it but I think that might be from when he tried Unrevoked or another method (he's tried to root it a few times unsuccessfully).

    The goal is to downgrade, root and S-OFF so he can try out some custom GB ROMs.

    Cheers,

    Lee

    u only need http://revolutionary.io (read the documentation for how to), u dont need downgrade
    revolutionary will s-off ur phone and install cwm, after that u can flash every rom u want

    by the way, even with s-on u can flash rom if u have root and cwm..s-off is full root and allow to write on /system while the phone is booted and other adavanced things
    1
    Is there anybody who can reupload the needed downgrade utility?

    Here you are.