I do this all the time, in fact it's the only internet connection which I use at the moment. Obviously you need a very large (or unlimited) data plan to do this, but if you have access to that then it can provide you with substantial savings. Basically all you need to do is activate the hotspot feature on your smart phone (be sure to put a password on it!) and you can connect to the internet through your phone with any device capable of wifi connections. (other phones, tablets, computer) One connection, one bill to pay, internet for all the devices.