Sprint Galaxy Note 4 Gets Android Lollipop Update
The Sprint has posted official information about the update of Samsung Galaxy Note 4, and the over-the-air rollout has started today.
Of course as is usual in such cases it might be a few days before your particular handset notifies you that the update is available, since the rollout is staged. Once you do get it, after applying the update know you'll be on software version N910PVPU1BOB7.
Along with the bump in Android iteration (and every colorful thing that brings with it), this update also features some unnamed Wi-Fi calling enhancements, so if you use that functionality it might work better than before.
If you're impatient, you can always manually check to see if the update is available for you by going to Settings > System > System update and (obviously) tapping Update now.