We're moving to a new house that has appalling broadband speed but a very good 4G signal. So before we move I've researched and found that using 3Network's SIM only unlimited 4G plan is the way to go. All the 4G dongle methods are capped data wise at levels way too small for anyone using Netflix, etc. As it's got to be used actually in a phone, I'm not sure about a few future problems. One thing that occurs to me is that the battery of the phone may not be able to keep up with it depleting via tethering whilst being charged? Also to get a good wireless "spread" over the whole house it will need some sort of booster system??
I'd really appreciate any ideas as this is all new to me!