How to downgrade myTouch 4G from 2.3.4 to 2.2

[virakcam]

Instruction:

• Download the original 2.2.1 ROM(PM me for the link) and put it into your SDcard (Don't extract it or rename it).
• While you are here, please follow this downgrade method: http://xdaforums.com/showthread.php?t=1178912
• Turn off your phone
• Boot your phone into bootloader: Press the volume down and power button (don't unhold it, until it boot into boodloader).
• After your phone has entered bootloader, press the power button. It will then scan for the associated rom file and ask you to update by pressing a key.Press the key it requests to perform the update.
• DO NOT INTERRUPT THIS PROCESS.
• Your phone will reboot once or twice - this is completely normal.
• This process will take roughly 5-10 minutes so make sure your phone is plugged in, either to an outlet or your computer.Once the process is finished, it will ask you to reboot by pressing a key. Press the associated key and it will reboot into the Stock Froyo rom!

 

[b33j7030]

sup bud.. tried this process but it says "Main Version is older! Update Fail!".. any solution to this?.. thanks man!

 

[eqjunkie829]

This definitely isn't the method to downgrade, there are other threads with the right way though.

Sent from my HTC Glacier using xda premium

 

[virakcam]

Ah, forgot one important step. I will update later. Sorry guys!

 

[Tazzaras]

easiest way is to goto the cynagone mod wiki about htc glacier they have all the files and the proper way to downgrade. I have done it on 2 phones thus far and no issues.

 

[virakcam]

maybe this guide is better: http://xdaforums.com/showthread.php?t=1178912

 

[b33j7030]

cool man i shall try it.. thanks again!

 

[modbass]

downgrade and root without tethering?

i have a request.

i have a MT4G and it will no longer tether to a computer is there a method to downgrade and root without tethering?

thanks

 

[DrumRobC]

Yes, that's the guide to use!

maybe this guide is better: http://xdaforums.com/showthread.php?t=1178912

I've performed several 'downgrades' and can verify this method definitely works.

 

[Adyfirst95]

hii

Hi!..
i have MT4G but i. tried to downgraded it TO 2.2.1 but.
the boot loader can't find the PD15IMG.ZIP
i tried everything.. formatted the sd card, nothing done
factory reset nothing done..
Can you explain me another simple method!! thanks
my V is 2.3.4

 

[unqualified]

Hi!..
i have MT4G but i. tried to downgraded it TO 2.2.1 but.
the boot loader can't find the PD15IMG.ZIP
i tried everything.. formatted the sd card, nothing done
factory reset nothing done..
Can you explain me another simple method!! thanks
my V is 2.3.4

Did you follow the instructions in this link, from the beginning, exactly as written? http://xdaforums.com/showthread.php?t=1178912

If so, if you are at step I-4a, make sure you didn't accidentally rename the file PD15IMG.ZIP.zip or anything (if your file extensions are hidden). Sad to say, I've done that before. Does the hboot show that it is looking for the PD15IMG.ZIP file and just runs right past it? All I can think is that the file is named wrong. Maybe the 'I' in IMG is a 1 or L or something?

I've done this a couple times and it worked flawlessly.

Also read through this, hopefully it isn't a bad chip issue, although I would think even a 'bad' chip would probably recognize the presence of a PD15IMG.zip file in the bootloader. http://xdaforums.com/showthread.php?t=1388962

 

[Adyfirst95]

no i didn't read those instructions..
ok but if i do.. the sd card would find the PD15IMG.zip??

 

[unqualified]

no i didn't read those instructions..
ok but if i do.. the sd card would find the PD15IMG.zip??

It should... I'm assuming you are on the stock 2.3.4 ROM and are trying to downgrade for root? Does the sd card work otherwise? What does the bootloader say when it searches for PD15IMG.zip?
More detail would probably help you get better answers.

 

[ghostlyninja]

Lost, need help. Do I rename the .zip file or the files within the folder? And what do I name them?