Downgrading Froyo 2.2 to 2.1 Eclair

[creepinshadow]

it does not work because the market is not optimize for 2.2 because its not a release update

yeah, it gives an error message when starting

CoPilot Code cannot be loaded from Library.

 

[techlogik]

You just need the latest Eclair Radio. Your favorite Rom and Kernel.

1) Wipe
2) Flash Eclair latest Radio
3) Flash favorite Rom
4) Flash favorite Kernel

Enjoy...back to 2.1

Which you will probably end up doing because there are so many problems with that test release.

I'm going to wait for a Desire Sense 2.2 custom Rom, probably later this year.

 

[techlogik]

do a search there is a tut.

and i am backing him up...for the last time you have to unlock the bootloader to revert back to 2.1

then just put a rooted froyo rom on to begin with (most are) and you don't need to type in all caps and in red!!!

 

[ram130]

then just put a rooted froyo rom on to begin with (most are) and you don't need to type in all caps and in red!!!

technically its not all caps.

 

[creepinshadow]

DOWNGRADE IS POSSIBLE WITHOUT ROOTING!!!


i tried it myself, with the instructions from ihearttreo, i downgraded from the manual 2.2 to 2.1, without a hitch..

and there's no Lock Symbol on the splashscreen, so its not rooted...

 

[TURBO DIAMOND]

ERD79-update-nexusone-stock-images.zip

You can downgrade. Check here : http://forum.xda-developers.com/showthread.php?t=688562

I followed the complete instructions and i'm not rooted and I was able to revert back to 2.1.

Here's from the thread.

(1) go to androidtechnical.info
(2) click on "ANDROID ROM LIBRARY"
(3) type "Google OEM" into the search boy (of course without the "")
(4) click on "Search"
(5) click onto the "Google OEM" link that says "Nexus One Shipping ROM (Original)" in the "Version" column
(6) at the bottom you will find the download link
(7) happy downloading

(1) Do a Factory Reset via Android OS

(2) Reboot into Fastboot, go into Bootloader and click "Cleare Storage"

(3) Reboot your phone, plug it into USB and make Windows access it via USB

(4) delete all files on the SD-Card, format it, and then copy the PASSIMG.zip onto your SD-Card

(5) Shut down your phone and boot it into fastboot again and go into bootloader again. Now the phone will regonize and load your PASSIMG.zip and ask you if you want to update.

Everything that follows this instructions should be self-explaining (press yes to update etc.).

I have the "ERD79-update-nexusone-stock-images.zip" file with same size with file you said (PASSIMG.zip) , is the same? or should i download the PASSIMG ? if they are same ,i should rename it to PASSIMG.zip?

 

[techlogik]

technically its not all caps.

You what is funny, I quoted it, and put it in all caps, but when you press submit, it keeps converting it to lower case...haha...

Just can't win...

 

[ram130]

You what is funny, I quoted it, and put it in all caps, but when you press submit, it keeps converting it to lower case...haha...

Just can't win...

lol.....the forums have its ways of keeping the rules intact..

 

[Mecha85]

You can downgrade. Check here :

I followed the complete instructions and i'm not rooted and I was able to revert back to 2.1.

Here's from the thread.

(1) go to androidtechnical.info
(2) click on "ANDROID ROM LIBRARY"
(3) type "Google OEM" into the search boy (of course without the "")
(4) click on "Search"
(5) click onto the "Google OEM" link that says "Nexus One Shipping ROM (Original)" in the "Version" column
(6) at the bottom you will find the download link
(7) happy downloading

(1) Do a Factory Reset via Android OS

(2) Reboot into Fastboot, go into Bootloader and click "Cleare Storage"

(3) Reboot your phone, plug it into USB and make Windows access it via USB (This step, does it require Android to boot up properly, and then turn on USB file transfer?)

(4) delete all files on the SD-Card, format it, and then copy the PASSIMG.zip onto your SD-Card

(5) Shut down your phone and boot it into fastboot again and go into bootloader again. Now the phone will regonize and load your PASSIMG.zip and ask you if you want to update.

Everything that follows this instructions should be self-explaining (press yes to update etc.).

Guys I'm having similar problems with others, it keeps saying 2.1 is an older version and it won't work. I'm stuck as it's been crashing on me all day.

Also, there are lots of .img files in the folder, do I keep them all in there, or remove some?

Please help!

 

[Mecha85]

Still nothing guys? I'm really stuck here and I need some help asap

 

[Blueman101]

Still nothing guys? I'm really stuck here and I need some help asap

whats wrong?

 

[Mecha85]

whats wrong?

I keep getting Main Version is older!
Updated Fail

And I've followed the instructions step by step

 

[rjhay22]

I can't certainly tell you what's wrong since I don't have a stock phone. But it seems like you haven't cleared everything that needs to be cleared, it still knows you're on Froyo, so it won't let you flash an older version eclair, redo 2nd part again, starting from step one. And I say make a back up of your SD card format it, there should only be one passimg file while your phone is trying to recognize it.

Try again... hope it works. Good luck.

I keep getting Main Version is older!
Updated Fail

And I've followed the instructions step by step

 

[Mecha85]

I'll try again mate

But I had a question for those who it worked for:

(1) go to androidtechnical.info
(2) click on "ANDROID ROM LIBRARY"
(3) type "Google OEM" into the search boy (of course without the "")
(4) click on "Search"
(5) click onto the "Google OEM" link that says "Nexus One Shipping ROM (Original)" in the "Version" column
(6) at the bottom you will find the download link
(7) happy downloading

(1) Do a Factory Reset via Android OS

(2) Reboot into Fastboot, go into Bootloader and click "Cleare Storage"

(3) Reboot your phone, plug it into USB and make Windows access it via USB (This step, does it require Android to boot up properly, and then turn on USB file transfer?)

(4) delete all files on the SD-Card, format it, and then copy the PASSIMG.zip onto your SD-Card

(5) Shut down your phone and boot it into fastboot again and go into bootloader again. Now the phone will regonize and load your PASSIMG.zip and ask you if you want to update.

Everything that follows this instructions should be self-explaining (press yes to update etc.).

Guys I'm having similar problems with others, it keeps saying 2.1 is an older version and it won't work. I'm stuck as it's been crashing on me all day.

Also, there are lots of .img files in the folder, do I keep them all in there, or remove some?

 

[rjhay22]

I see... have fun waiting for them to reply then ;-)

I'll try again mate

But I had a question for those who it worked for:

 

[Mecha85]

Hope that didn't sound rude!

Anyway hopefully those in the know with Android might be able to advise me on step 1/2

When the phone is factory reset it boots STRAIGHT away to the Nexus boot screen, I can't stop it even if I hope the PWR + Trackball buttons. Then the little Android and an arrow coming out of a box process happens, then I can go into the boot menu.

Is there another way of doing a factory reset and then I can boot straight away into the boot menu?

Also, can you put USB files on the phone anyother way except via USB file transfer? As that only happens when Android has booted (Step 3)

It seems this is where 2.2 is getting reloaded

Thanks

 

[ram130]

Hope that didn't sound rude!

Anyway hopefully those in the know with Android might be able to advise me on step 1/2

When the phone is factory reset it boots STRAIGHT away to the Nexus boot screen, I can't stop it even if I hope the PWR + Trackball buttons. Then the little Android and an arrow coming out of a box process happens, then I can go into the boot menu.

Is there another way of doing a factory reset and then I can boot straight away into the boot menu?

Also, can you put USB files on the phone anyother way except via USB file transfer? As that only happens when Android has booted (Step 3)

It seems this is where 2.2 is getting reloaded

Thanks

yes you can go into the boot menu. ALL N1s can(YOU SURE U HAVE ONE?) Try Power Button + Power UP while the phone is off(after the factory reset, just shut down). As they have said, make sure there is ONEPASSIMG.zip ( renamed to PASSIMG.zip ) that you copy to your EMPTY sd card.

If there are multiple files, YOU either downloaded the wrong file or you are trying to "open" the zip file. Follow the instruction properly. You do NOT unzip the zip file, you copy it after renaming.


Gluck

 

[Mecha85]

yes you can go into the boot menu. ALL N1s can(YOU SURE U HAVE ONE?) Try Power Button + Power UP while the phone is off(after the factory reset, just shut down). As they have said, make sure there is ONEPASSIMG.zip ( renamed to PASSIMG.zip ) that you copy to your EMPTY sd card.

If there are multiple files, YOU either downloaded the wrong file or you are trying to "open" the zip file. Follow the instruction properly. You do NOT unzip the zip file, you copy it after renaming.


Gluck

THanks I'll try again

Just incase I wasn't too clear, the phone does boot into the bootloader when it's off then turned on, but it's only when I do a factory restore that it automatically boots back into Nexus

I'll try again

*edit, the zip file had multiple files in there, about 8 or so

 

[ram130]

THanks I'll try again

Just incase I wasn't too clear, the phone does boot into the bootloader when it's off then turned on, but it's only when I do a factory restore that it automatically boots back into Nexus

I'll try again

Then once it's booted, just shut down again. Then "clear storage" from the boot loader.

 

[Mecha85]

Bah it's still not working

I tried it step by step for the past few hours since my last post and I get nothing

Don't know what to do now