Jim, what kind of smartphone do you have? You might want to check with your service provider and see what phones are available with hot spot feature. My wife and I both have Verizon Motorola Droid Maxx phones and a 10 GB shared data plan. We also both have a WIFI only Nexus 7 (2013). We use the hot spot feature all the time when not at home. With Verizon, it is no additional cost with the shared data plans. Sorry, if you already know all this. Not trying to sound condescending at all.