I have a few computers at home, one of them is 3 years old tower type desktop PC. There is also a M600 notebook which is now 2 years old. Also this 13" MBP which I use for work. Ever since I have mobile broadband instead of fixed installation I can't allow 2 computers to access internet at the same time. So I needed below. It's said that this gadget allows SIM by other carrier, I'll be trying that later.