Android 5.0.1 rollout begins for T-Mobile's Samsung Galaxy Note 4
Because of the hefty size of the file, we would suggest being connected to a Wi-Fi signal when downloading and installing the update. You also should have your battery charged to at least 50% The entire process will probably take you more than 20 minutes to complete.
Because the update is rolling out in waves, your phablet might not receive it for a few days. Stay patient, even if everyone all around you has received Android 5.0.1 and you're still plugging away on KitKat. Your turn will come.