I'm in the same boat, I'd like to use my note 2 on straight talk and have network access.. but as it stands I'm running I605VRUEMJ9 rooted. when i do everything this suggests it locks me out of my APN settings, i had an app for a "shortcut" to APN settings, but when i try to add an APN it doesn't save it when i click "settings/save" it's like it removes the APN entirely. i've heard of a bootloader unlock service hosted by a website, but i'm unsure of it being legit, i'd love to run cyanogen mod i have it on my S2 skyrocket.