Edit: I think it's but right to edit the first post as it is already confirmed. In any case, for those who still don't have the updates but is dying to flash it manually, let me just put here the steps I took. It's pretty easy and straightforward. For those with non-yakju devices, these steps and files will make your GSM device a plain yakju GNex.Can anyone confirm this? My finger already tired from hitting refresh button on my phone.
Google confirms Android 4.0.4 update on Xoom, GSM Nexus S and Galaxy Nexus | Android Central
I know as well there are tool kits that make life easier. I just want to share the long process in case anyone is interested. I'm an old fashioned kinda guy. Apologies to our tool kit makers.
These files, by the way, are the full ROM images and not just the incremental updates.
1) Note: do make sure you already have the drivers installed for your device to run. you can do a google search for the needed samsung drivers; (For those that are having a hard time getting the drivers installed properly, the easiest is to just download the latest version of Kies, run it and close it. It updates your drivers automatically). Do note you need to install the drivers twice. Once when the phone is not connected for adb to read and once when in fastboot mode. You can use Device Manager in making the second installation.
2) Download https://dl.google.com/dl/android/aos...y-8001e72f.tgz and unzip the files within to a directory (unzip the zip inside as well); source for this is: https://developers.google.com/android/nexus/images
3) Download http://www.box.com/s/fefba711c4350e81e59b and extract the files into the same directory above;
4) Enable usb debugging on your device and plug it into your computer;
5) Open a command prompt in the same directory above and do the following:
1) Make sure your computer recognizes your device by typing: adb devices
2) Go into fastboot mode on your device by typing: adb reboot-bootloader (Your phone should now be in fastboot mode - beats having to press the volume up/down and power)
3) Verify that your computer recognizes your device in fastboot mode by typing: fastboot devices
4) Unlock your bootloader: fastboot oem unlock
5) You will see a prompt on your device. This will wipe your entire device (including the /sdcard folder). Accept.
6) Reboot by typing: fastboot reboot-bootloader
7) Flash the bootloader: fastboot flash bootloader bootloader-maguro-primela03.img
8) Reboot: fastboot reboot-bootloader
9) Flash the radio: fastboot flash radio radio-maguro-i9250xxla02.img
10) Reboot: fastboot reboot-bootloader
11) Flash the IMM76I system partition: fastboot flash system system.img
12) Flash the IMM76I data partition: fastboot flash userdata userdata.img
13) Flash the IMM76I boot partition: fastboot flash boot boot.img
14) Flash the recovery partition: fastboot flash recovery recovery.img
15) Reboot: fastboot reboot-bootloader
16) Erase the cache partition: fastboot erase cache
17) Optional -- Lock bootloader: fastboot oem lock
18) Reboot: fastboot reboot
That's it. You are done!
Links updated to get the latest GSM full factory image for IMM76I