You already have the update.
The tmobile version got the update when they started selling the phone, my sprint version has yet to see the update
Posted via the Galaxy Note 4
That's because there is no update for your phone.
My sprint says to update, but no updates are available because if it was current it would say current
Posted via the Galaxy Note 4
Is My Sprint an account app?
Yup
Posted via the Galaxy Note 4
According to Sprint support there is no update available but I see the My Sprint support site is offline for maintenance right now. Maybe that is why you are getting that. Or maybe they are updating the site now with software update info. Will have to wait and see when it comes back online. Did you try Kies?