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Convert Stock Yakju 4.1.2 to Stock Takju 4.2 without loosing data/apps

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By freezer2000, Senior Member on 16th November 2012, 06:57 AM
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Are you a Galaxy Nexus (yakju) user and waiting for the 4.2 OTA update while the same has been pushed for Takju variant... please follow below to convert from yakju to takju (stock) without loosing your data/apps: (assuming you know adb & fastboot and have set them up on your computer. Also assuming that bootloader is unlocked) [Please read before you implement]

1. Download the 4.2 factory images for Takju from http://goo.gl/UMbmS
2. Extract files using 7-zip on Windows (you need to extract twice and will get the files as: bootloader-xxx.img; radio-xxx.img and image-xxx.zip)
3. Copy these files to the location android-sdk/platform-tools/ (if you have the android-sdk installed or to the location where adb & fastboot is)
4. Plug in your Galaxy Nexus (ensure Debug option is enabled under Developer Settings
5. Follow these commands:
a. adb reboot bootloader
b. fastboot flash bootloader bootloader-xxx.img
c. fastboot reboot-bootloader
d. fastboot flash radio radio-xxx.img
e. fastboot reboot-bootloader
f. fastboot update image-xxx.zip

This would update your Galaxy Nexus from Stock 4.1.2 (yakju) to Stock 4.2 (takju) without losing any data/apps

Note:
1. If you using Windows follow the video tutorial to setup adb and fastboot http://goo.gl/jGcic
2. If you are on Mac, use ./ before the commands for execution

Note 2: With this method you don't need to remove the userdata.img as the command "fastboot update image-xxx.zip" does not touch the userdata on your device.



*Disclaimer: I have followed the above to the T and moved from Stock 4.1.2 (yakju) to Stock 4.2 (takju) with Unlocked Bootloader, but you follow these at your own risk.

Hit Thanks, if this has helped you.
Last edited by freezer2000; 16th November 2012 at 11:41 AM.
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16th November 2012, 07:43 AM |#2  
neelabh75's Avatar
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Why are you using crespo images instead of maguro?
16th November 2012, 07:49 AM |#3  
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ROFLCOPTER. Say thanks for copy paste and already posted o0
16th November 2012, 07:54 AM |#4  
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I understand that you are avoiding userdata cause it will wipe the existing one. But if one does not flash the boot image, will the next OTA(if ever happens) will be successfully installed?
16th November 2012, 08:11 AM |#5  
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Quote:
Originally Posted by neelabh75

I understand that you are avoiding userdata cause it will wipe the existing one. But if one does not flash the boot image, will the next OTA(if ever happens) will be successfully installed?

This should allow you to update the next OTA without any issues..
16th November 2012, 08:11 AM |#6  
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Code:
fastboot update image-xxx.zip
This will almost definitely wipe the data, as image-xxx.zip contains userdata.img
Every other place I have read instructions, they have mentioned that userdata.img must be removed from image-xxx.zip before updating it.
16th November 2012, 08:20 AM |#7  
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To do this you have to have the bootloader UNLOCKED. In the bootloader unlock process, all your data will be wiped, so this guide

DOESN´T WORK
16th November 2012, 08:21 AM |#8  
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Quote:
Originally Posted by paganwinter

Code:
fastboot update image-xxx.zip
This will almost definitely wipe the data, as image-xxx.zip contains userdata.img
Every other place I have read instructions, they have mentioned that userdata.img must be removed from image-xxx.zip before updating it.

Sure you're righrt, you've to remove it from the zip file. This guide is not so useful as it should be.
By the way to perform all this actions you need unlocked bootloader, if you haven't yet you will LOSE ALL YOUR DATA when unlocking with: fastboot oem unlock
16th November 2012, 08:25 AM |#9  
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Quote:
Originally Posted by yxcv99

ROFLCOPTER. Say thanks for copy paste and already posted o0

Thanks for your comment.
At least I made you laugh... Have a Good Day
16th November 2012, 08:27 AM |#10  
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Quote:
Originally Posted by paganwinter

Code:
fastboot update image-xxx.zip
This will almost definitely wipe the data, as image-xxx.zip contains userdata.img
Every other place I have read instructions, they have mentioned that userdata.img must be removed from image-xxx.zip before updating it.

Yup.. You MUST remove userdata.img..
16th November 2012, 08:30 AM |#11  
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Quote:
Originally Posted by Samhain77

Sure you're righrt, you've to remove it from the zip file. This guide is not so useful as it should be.
By the way to perform all this actions you need unlocked bootloader, if you haven't yet you will LOSE ALL YOUR DATA when unlocking with: fastboot oem unlock

That's correct unlocking the bootloader will result in loosing the data.

I should have mentioned that mentioned the assumption of the bootloader being unlocked in the first place. Will do the edit.

Thanks

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