[Idiot's Guide] Back to Stock, no su, no BusyBox, etc.

[shantanu]

Idiot's guide to getting back to stock:
Tested and works!
Safe for 2.1, thanks to Sholes!

Plug your phone into the computer and mount your sdcard so you can see it in your Operating System on the computer (turn on USB storage)

Download http://alldroid.org/download/file.php?id=651 and unzip it. Copy the boot.img and recovery.img to your sdcard.
Download http://www.sholes.info/wp-content/up...oem-backup.zip and unzip it. Copy it to the nandroid folder on the sdcard.

Safely remove the card from your Operating System (Right click on the drive and hit Eject for you Windows users)

Turn off USB storage on the phone now

Reboot into recovery
Pick Backup/Restore > Advanced Nandroid Restore > Backup
Select the virginoem-backup
Select Perform restore
When it's finished, select Reboot system now.

Once the phone is back on, open terminal or an ADB shell

Copy and paste the following if using an ADB shell, or type it all in if using a terminal emulator on the phone:
(if using adb shell, don't forget to put phone in USB debugging mode)

su
flash_image recovery /sdcard/recovery.img
flash_image boot /sdcard/boot.img


Reboot into recovery (press x on the physical k/b + power button) and verify that you have to press Vol+ and Camera to be able to get to the menu.
If the nandroid recovery menu comes up, you'll need to try the above steps again.

If it is the stock recovery, reboot

REMAINING IS IN 2ND POST

[shantanu]

CONTINUE

Once you are back in the OS, you still have root and busybox installed, because the nandroid backup you restored has those.

So the next step is to either open a terminal on the phone or go into ADB shell and run the following commands:
su
mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
rm /system/bin/busybox
rm /system/xbin/busybox
rm /system/app/Superuser.apk
cd /
mv recovery-from-boot.old recovery-from-boot.p

if you receive "error failed on 'recovery-from-boot.old' - No such file or directory" don't worry, it's ok, just go to the next step.
From there you still have su left, and you have 2 options for getting rid of it.

a) Since you are already root, just run rm /system/bin/su .. I personally don't like this option because the phone by default has a su binary that just doesnt allow you access.
After you do the above do this:

mount -o remount,ro -t yaffs2 /dev/block/mtdblock4 /system
sync
reboot

b)- (prefered method)
Download the official https://android.clients.google.com/u...0.84263456.zip , which will replace the 2.0.1 su binary.
Rename it to update.zip
Copy it to sdcard
Reboot phone in to recovery(hold x + power button, at the /!\ hold the volume+ and camera button.
Select apply sdcard:update.zip, you might see an error but it should complete.
Reboot when finished.

Once you are done with all of that you are back at a stock image.
To test if su is gone, download Android Terminal Emulator and do an su, you should get a permission denied response.If you want to take an extra step, which isn't really needed, do a factory reset.
Now go download at least a couple of the apps you use so your phone looks like it's actually been used.

THANKS TO SPEEFDYMON