I was running Yakjuxw 4.0.4(OTA comes from Samsung) on my GSM GNEX and couldn't wait for Samsung to push Jellybean anymore so I looked around and found this, it changes Yakjuxw(4.0.1, 4.0.2 and 4.0.4) to Yakju 4.0.1(OTA comes straight from Google).
Here are the steps I followed from rubiconjp's post and cleaned it up for everyone that was in my position. After the downloads, it took like less than 10min to get it on Yakju. It is super easy. No Rooting, No Custom ROMs.
Download the USB driver and firmware files to Windows.
Firmware
USB Driver
Run USB driver app in Windows, Reboot Windows
Run firmware app in Windows
Put phone in Download mode (Power off, Press Volume Down button + Power On button down until it goes to Download Mode, plug USB cable in)
Once the device is found in the firmware app, click start!
Let it finish and you are done.
When it starts back up you should setup your phone back up with all the Apps that you want before installing the OTAs. It's going to go from 4.0.2>4.0.4>4.1.1. From start to finish it took me 30-40min to get my phone back the way I want it. Good luck and enjoy.
Here are the steps I followed from rubiconjp's post and cleaned it up for everyone that was in my position. After the downloads, it took like less than 10min to get it on Yakju. It is super easy. No Rooting, No Custom ROMs.
Download the USB driver and firmware files to Windows.
Firmware
USB Driver
Run USB driver app in Windows, Reboot Windows
Run firmware app in Windows
Put phone in Download mode (Power off, Press Volume Down button + Power On button down until it goes to Download Mode, plug USB cable in)
Once the device is found in the firmware app, click start!
Let it finish and you are done.
When it starts back up you should setup your phone back up with all the Apps that you want before installing the OTAs. It's going to go from 4.0.2>4.0.4>4.1.1. From start to finish it took me 30-40min to get my phone back the way I want it. Good luck and enjoy.