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

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By teppic74, Retired Recognized Developer on 29th August 2010, 02:24 PM
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30th August 2010, 08:06 PM |#101  
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teppic74 you are the best
I am now in a 1.21 ROM and a 0.83 HBOOT
I spent nearly all my afternoon but that have not been for nothing
thanks again
30th August 2010, 09:10 PM |#102  
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Quote:
Originally Posted by androidissime

teppic74 you are the best

As a lurker for the past few days, I second this appreciation of teppic74's work!!!
Everything went quite smoothly, and I am now running a MoDaCo custom Froyo image.
30th August 2010, 09:48 PM |#103  
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This worked perfectly for me with no hitches at all, great program, great instructions and a great result! Now to get cracking with rooting it
30th August 2010, 10:15 PM |#104  
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Unhappy Don't work
Your tool seems don't work with mine (Windows 7 / Ubuntu)

It doesn't find PB99IMG.zip after bootloader screen

I noticed some differences with other device.

My desire come back from customer service (radio card replacement - the famous reboot issue)

Bootloader screen shows:

BRAVO PVT3 SHIP S-ON
HBOOT-0.92.0001
MICROP-51d
TOUCH PANEL-SYNT0101
RADIO-5.09.0.00.20
Jul 23 2010,16:46:44
30th August 2010, 10:22 PM |#105  
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Quote:
Originally Posted by Blackjack3d

This worked perfectly for me with no hitches at all, great program, great instructions and a great result! Now to get cracking with rooting it

Yes! Now i can finally install a stock Android FroYo rom and get hyped about it! Will try it in a week when i get back home from vacation. Thanks a lot!

Sent from my HTC Desire using XDA App
30th August 2010, 10:24 PM |#106  
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Please post the output you get.
30th August 2010, 10:47 PM |#107  
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No error appear.
Push on SD card => OK.
Obtained root access => OK.

The device reboot after and all instructions are printed on the console output: press power button, etc ..., etc ...

But, after holding vol up key, it doesn't find the PB99IMG.zip.

I try manually too (win and ubuntu)
I posted by bootloader screen because I saw your attachment file.

Sent from my HTC Desire using XDA App
30th August 2010, 11:22 PM |#108  
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I need to see the full output really, but if it passed the check when it was transferred to the sdcard then it is probably an issue with your sdcard. I have the same bootloader information as you, so I doubt it is that.
30th August 2010, 11:34 PM |#109  
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If the phone can't detect the file on the sdcard but the rest of the process is successful you can use an RUU in Windows instead - see the first post for details (I've updated with a link).
31st August 2010, 12:28 AM |#110  
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This helped lots! Just make sure your sd card is formatted ok!
I had to re-format it agin and make it a goldcard again for it to work.

on my way to putting leedroid 2.0a on my desire now!

31st August 2010, 12:56 AM |#111  
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Froyo - broken camera
Hi, I had the following after updating to the generic HTC 2.2:


BRAVO PVT3 SHIP S-ON
HBOOT-0.92.0001
MICROP-051d
TOUCH PANEL-SYNT0101
RADIO-5.09.00.20
Jul 23 2010 16:46:44

However the Google Sky map didn't work anymore (stuck on south!) and the camera app didn't seem to update. From reading the various forums, that looks like it was the Radio firmware didn't get picked up?

I'm running your download at the mo, and I'll see if it's all working properly, then I'll try updating again.

[UPDATE]
Hmm, well after downgrading I get:
BRAVO PVT3 SHIP S-ON
HBOOT-0.83.0001
MICROP-051d
TOUCH PANEL-SYNT0101
RADIO-4.08.00.09


Thanks so much for providing this super downgrade tool. Now time to re-upgrade lol
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downgrade, froyo, hboot, root, slcd

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