As long as you are connected to Wi-Fi, you can be on a call and still use data. At home I have Wi-Fi, at my office I have Wi-Fi, nearly every restaurant downtown has Wi-Fi. The point is Wi-Fi is ubiquitous. via Codesketch
Paul has a point. It’s not a big deal to have a smart phone with a hotspot feature if you use that feature very little or not at all. But then why pay for a data plan? Just get an iPod Touch and use one of those free regular phones to make calls.