From what I've seen the models outside the US have full phone functionality.
Three however will block the use of a phone Sim in a tablet so if they're identifying the note 8.0 as a tablet, not a phone they may disconnect the data.
Not sure what three are classing it as. With the plans it's only with a data Sim but their systems may allow it as a phone.
If you put a One Plan Sim in anything but a phone, they cut data off from what I've read to stop people using unlimited data in 3g dongles, computers or tablets.