How To: Unroot the Motorola Milestone

I. Before You Begin

This is assuming you did our How To Root the Motorola Milestone procedure.

II. ADBRecovery

1. Download ADBRecovery.

ADBRecovery

2. Extract it’s contents to somewhere on your computer.

3. Plug your phone in normally and mount the SD card (so we can transfer files to it from our computer).

4. Copy the just the update.zip file and the folder named “recovery” from inside the ADBRecovery > in_sd_root folder that we extracted earlier to the root of the SD card in your phone (NOT in any folders on the sd card just on the sd card itself).

5. Turn off your phone.

6. Turn the phone back on while holding the Camera button down until the ! screen comes up.

7. Once the ! comes up, let go of the Camera button and then hold down Volume Up and press the Camera button until a menu appears.

8. Choose apply sdcard:update.zip and wait for it to flash the update.

III. Performing a Nandroid Backup Through ADB

1. Leaving your phone in recovery mode after it flashes the update.zip, plug it in to your computer via USB cable.

2. On your computer, open the command prompt (Start >Type in cmd and hit enter).

3. In the command prompt type the following with hitting enter at the end of each line:

cd\
cd AndroidSDK\tools\
adb shell
nandroid-mobile.sh –backup

*the — in the last line above is actually two hyphens side by side

4. Once it is done with the backup, type the following and hit enter:

reboot

5. Let the phone reboot into normal mode.

IV. Download A Nandroid Backup to Restore and Flash It

1. Plug your phone into the computer via USB cable and mount the SD card (so we can transfer files to it).

2. Head over to this site and download one of the non rooted nandroid backups for your region.

Nandroid Backup Repository (MAKE SURE TO CHOOSE YOUR REGION AND IT SAYS NON ROOTED NEXT TO IT)

3. Extract the contents of the  .zip file you downloaded above somewhere on your computer. Then copy all the files from inside the extracted folder (just the files like “system.img” “boot.img” etc. NOT the folder itself) into the nandroid > console=ttyS2,115200n8 > Milestone-BbCcDMRS-20100329-2033 folder (your exact names of the folders may be different) on your SD card. Then hit yes to Copy and Replace on all the files.

4. Unplug the phone once it has finished transferring the files over.

5. Turn off your phone.

6. Turn the phone back on while holding the Camera button down until the ! screen comes up.

7. Once the ! comes up, let go of the Camera button and then hold down Volume Up and press the Camera button until a menu appears.

8. Choose apply sdcard:update.zip and wait for it to flash the update and then plug the phone in to your computer via USB cable.

9. Open the command prompt again and type the following with hitting enter at the end of each line:

cd
cd AndroidSDKtools
adb shell
nandroid-mobile.sh –restore

*the — in the last line above is actually two hyphens side by side

10. Once it is done with the restore, type the following and hit enter:

reboot

11. DONE!

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