[HOW TO] GSM: Manually Flash Jellybean 4.1.1 Yakju/Takju Full Factory Image

[thephantom]

Edited for Jellybean 4.2.1

If you are stuck at ICS and would want to update to the latest Jellybean JOP40D for GSM Galaxy Nexus, here's a guide:

What's needed:
1. USB drivers - . https://www.box.com/s/7sutkummukh4pup0rwoi Do make sure that when you install them, they are installed twice. Once in regular phone mode and another in fastboot mode. Fastboot mode is simply turning off the phone then turning it on by pressing both volume up and down then power.
2. Fastboot and adb files: http://www.box.com/s/fefba711c4350e81e59b
3. The yakju or takju files from: https://developers.google.com/android/nexus/images. It is your option to choose which file you want. The difference between the two is that takju has Google Wallet pre-installed.
yakju: https://dl.google.com/dl/android/aos...y-279cdc5d.tgz
takju: https://dl.google.com/dl/android/aos...y-e4d13f14.tgz

Steps:
1. After making sure the drivers are installed and working, extract the files in number 2 and number 3 in just one folder. In addition, there is an additional zip file in number 3 which needs to be extracted as well in the same folder. Technically you should have 13 files in the folder you created - 4 for the fastboot and adb extracted files and 9 from the full rom image.
2. open a command prompt and navigate to the folder you created
3. turn on phone in fastboot mode (volume up and down then press power)
4. type: fastboot devices. you should see the unique serial id of your device. it is NOT the imei
5. if the bootloader is already unlocked, skip this step and proceed to number 7. type: fastboot oem unlock. this will prompt your phone to unlock the bootloader and when you choose, "yes", data will be wiped out.
6. type: fastboot reboot-bootloader
7. type: fastboot flash bootloader bootloader-maguro-primelc03.img
8. type: fastboot reboot-bootloader
9. type: fastboot flash radio radio-maguro-i9250xxlh1.img
10. type: fastboot reboot-bootloader
11. type: fastboot flash system system.img
12. type: fastboot flash userdata userdata.img
13. type: fastboot flash boot boot.img
14. type: fastboot flash recovery recovery.img
15. type: fastboot reboot-bootloader
16. type: fastboot erase cache
17. this is optional if you want to re-lock your bootloader. type: fastboot oem lock
18. type: fastboot reboot

Your phone will reboot and you will need to set it up like it just came out of the box and now you have Jellybean 4.2.1

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[Victor]

Works like a charm, kudos to you and your genius!

[shahrukh.siddiqi]

please help me, i am also stuck with 4.1.1 with yakjuxw on my maguro GSM galaxy nexus. i am a total n00b when it comes to this stuff. i downloaded the yakju for maguro 4.1.2 and want to somehow flash it onto my nexus. i know that much that to get to the bootloader screen on the phone i have to turn off then press all buttons, but then how am i supposed to flash this .tgz file i downloaded from google?! please help

[RobKort]

First of all, are you rooted and the bootloader unlocked?

-end of line-

[shahrukh.siddiqi]

no i am not rooted, and as far as i know this process does not require rooting

[RobKort]

Ah ok, you are referring to a stock ROM?

-end of line-

[shahrukh.siddiqi]

its called a stock recovery from what i know till now

[thephantom]

You need to extract the file you got from the Google site as explained and flash using fastboot. It's in the steps provided. Though the file in the steps are for 4.1.1, you can still use it so you have ota updates until the latest or directly use the file you downloaded so no need for ota

Sent from my Nexus 4 using Tapatalk 2

[hanaero]

I have to say, this worked perfectly. My phone was stuck on 4.0.4 and I was aware that I needed to manually update. I was worried doing it this way I could break the phone but in the end it worked like a charm. Thank you.

Only issue was getting the driver to work in fastboot mode on my PC - that was annoying but this article solved it (how to install device drivers(android 1.0) - Android Forums at AndroidCentral.com)