Also, is there a way I can verify that I did this properly? like is there a way that I can check what radio file the phone is currently running?

Originally Posted by mrrhtuner

Hello everybody, so after using JB 4.2.2 I have noticed the antenna in certain locations isn't as good as it was and the battery does wear down much quicker.

Regardless, I decided to revert back to Galaxy Nexus Yakju 4.1.2 but ONLY the radio file.

So following efrants guide, I did the following.
-Downloaded from Google developers 4.1.2, unzipped all the contents into one folder.
-I downloaded platform-tools-v16.zip and extracted all the contents of that zip into the folder above that contains the unzipped image files.
-As I locked my boot loader before when I went to 4.2.2, I had to unlock the boot loader.
-then I did the Part D step 7, flash the radio.
-fastboot flash radio radio-maguro-i9250xxlf1.img
-one that was done, I did fastboot reboot to reboot the phone
-Phone loaded up one again.

One observation, its odd but it seems that my phone has been wiped clean, but my wallpaper that I set before doing this is still there. All my text and everything is gone but the wallpaper is there, so I'm not sure what that means exactly.

From those of you that have done this, does it seem like I completed the radio flash-downgrade properly?

I'd like to verify to be certain

Thank you!

As stated in that thread: unlocking the bootloader wipes all of your data. Your wallpaper is backed up on your Google account (just like your contacts and Wi-Fi settings) and was downloaded when you signed in to your Google account.

Originally Posted by mrrhtuner

Also, is there a way I can verify that I did this properly? like is there a way that I can check what radio file the phone is currently running?

Reboot your device in fastboot mode and you will see the radio version there.

Thank you efrant!

This is all new to me but with your instructions it was a massive help through the process.

And I totally forgot that the Google account backups up wallpapers lol

Just tested the fastboot mode...

says baseband is: i9250xxlf1.img, which is the file from 4.1.2

yay now lets see how it will work!

Originally Posted by mrrhtuner

Just tested the fastboot mode...

says baseband is: i9250xxlf1.img, which is the file from 4.1.2

yay now lets see how it will work!

For anybody reading this in the future....I reverted my friends galaxy nexus radio file back to 4.1.2 and the signal issues are resolved. Certain locations of our college were fine with 4.1.1, but with JB 4.2.2 those spots wouldn't get me a strong data sigal. I couldn't pull up basic web sites.

With the radio file from 4.1.2, it is now all better