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[HOW-TO] Revert HBOOT 0.35.0017 to 0.33.0012

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By cursordroid, Senior Member on 15th July 2010, 04:37 PM
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I CAN'T RELOCK THE BOOTLOADER!!!

This only reverts your SPL/HBOOT back to 0.33.0012 after you've installed the Korean FRF91 files and ended up stuck with 0.35.0017 SPL.

Thanks to the guys in the Desire forums and help from the Nexus Q&A, I have reverted my phone to the original HBOOT so I can apply custom roms again.

First you need to root the Korean FRF91 that's on your phone using Paul's instructions for superboot FRF83.
If you are rooted already, skip this step.
http://android.modaco.com/content/go...the-nexus-one/

You need to download the EPF30 update, save it to your SD card as PASSIMG.zip.
http://shipped-roms.com/shipped/Pass...ase_signed.zip

Create a new mtd0.img file through this site
http://ks33673.kimsufi.com/misc/
I used the values, CID: 11111111 and Rom version: 0.22.997.0
Save the mtd0.img file to you PC.

Download the flash_image binary (right click, save as)
http://benocharm.lensworks.org/flash_image
Make sure it's saved as flash_image, and not flash_image.txt
If it has a Notepad icon, then it's not saved right.

With mtd0.img and flash_image in the same folder, type these commands from within that directory:
Code:
adb push flash_image /data/flash_image
adb push mtd0.img /data/mtd0.img
adb shell
chmod 755 /data/flash_image
/data/flash_image misc /data/mtd0.img
NOTE: After flashing the MISC partition with the MTD0 from the Desire, you will notice that you have an HTC logo on your phone.
No worries, this goes away after reflashing the EPF30 Nexus One PASSIMG.zip package.

Power off your phone, then turn it on by holding VolDown and pressing Power.

It will start up in HBOOT mode and will prompt you to flash the EPF30 PASSIMG.zip update.

Once this is finished you can root the EPF30 system through Paul's superboot instructions above, then use Rom Manager from the market to apply a custom recovery again.

Now, remember not to flash the new HBOOT again.

I'd recommend flashing the 5.08 radio for the N1 through other means. Search the forum to find the instructions.
 
 
15th July 2010, 04:39 PM |#2  
cursordroid's Avatar
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Reserved.

15th July 2010, 04:56 PM |#3  
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Thanks a lot cursordroid.
Finally I managed to downgrade my hboot.

I could save several steps as my phone is unlocked.
So I just needed to:
- make a nandroid backup
- Go through the steps of flashing mtd0.img
- Apply PASSIMG.zip file
- Through fastboot re-install a custome recovery image
- Nandroid restore

Thanks!
15th July 2010, 04:57 PM |#4  
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Quote:
Originally Posted by rommelin

Thanks a lot cursordroid.
Finally I managed to downgrade my hboot.

I could save several steps as my phone is unlocked.
So I just needed to:
- make a nandroid backup
- Go through the steps of flashing mtd0.img
- Apply PASSIMG.zip file
- Through fastboot re-install a custome recovery image
- Nandroid restore

Thanks!

That sounds like it should work, except I'm not sure fastboot accepts unsigned recovery images, you might still need to use Rom Manager to flash one.

YMMV
15th July 2010, 05:06 PM |#5  
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WTF! This can relock the bootloader?

Where is the link to the latest HBOOT?????????????
15th July 2010, 05:13 PM |#6  
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Quote:
Originally Posted by cursordroid

That sounds like it should work, except I'm not sure fastboot accepts unsigned recovery images, you might still need to use Rom Manager to flash one.

YMMV

Just did it
You can definitely flash the recovery directly from bootloader when the phone is unlocked.


I forgot to mention one extra step I took.
Delete through adb the PASSIMG.zip file from the sdcard before trying to enter in bootloader and flash the recovery.

For that, I just needed to boot the stock firmware, enable usb debugging mode and:
#adb shell rm /sdcard/PASSIMG.zip
15th July 2010, 05:17 PM |#7  
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So if I upgrade I loose root? then i root and reflash stock PASSIMG.zip with original HBOOT after flashing Desire hboot I can get stock bootloader meaning? Security gets disabled when using HTC HBoot? so i can relock my bootloader then update using PASSIMG??????????????



I dont think youve realized how happy you made everyone on this forum is you figured out you can relock the bootloader lol!
15th July 2010, 05:35 PM |#8  
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I CAN'T RELOCK THE BOOTLOADER!!!

This only reverts your SPL/HBOOT back to 0.33.0012 after you've installed the Korean FRF91 files and ended up stuck with 0.35.0017 SPL.
15th July 2010, 07:03 PM |#9  
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Quote:
Originally Posted by cursordroid


This only reverts your SPL/HBOOT back to 0.33.0012

And that's already a lot
Not being able to install or upgrade to any signed build (like recent CM 6.0) including official ones... is not funny. It's really annoying.

Going back to normal is lik
e having a new phone again
15th July 2010, 07:29 PM |#10  
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Then, what does 0.35.0017 do, if not locking the Nexus?
16th July 2010, 06:06 PM |#11  
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i'm getting an error saying incorrect cid. i actually have korean nexus one. i've been following all the steps but stuck when i try to flash the rom with passimg. big error msg saying incorrect cid. what to do now?
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