Mixture.... "Personal hotspots are the way forward....you can buy nice little personal hotspot gadgets off Amazon and stick your own choice of SIM in them."
Thing is mixture, they all still work as on dongle principal (mobile wifi) I use Three (wifi) it's powered from the internal battery, no leads required. It still does the same internet connections as a dongle. The only difference being a dongle needs power from the lappy.
Mixture.....Your now in my little black book, come the revolution when Microsoft takes over the world.... I'll say no more