This site may be a bit too expert for the likes of me, but all I want to know is can I use a smart phone SIM in a tablet, and which tablet would you recommend? Or, could I cast or tether or use the phone as a Wi-Fi hotspot ( whatever that is ) or plug in the USB lead to watch films and sport on a laptop or tablet? Many thanks, and please remember my first computer was a Commodore 64 and I still think Paperboy as state of the art.