Getting Unlocked GN3 Tomorrow. topic

So I'm transferring over to Straight talk on with the Note 3(SM-N900). I've only been with Sprint and don't know If I root and switch roms, that i'll lose the unlocked status. As long as the APN settings are aligned with straight talk, wouldn't I be fine? Or would I not be?
PS. I had a note 3, but it got stolen :S
Sorry if this has came up before.