Me. Free
Google Voice for mobile phone & text needs (& mobile voice mail & vm transcription) AND via wired landline phones + alarm system at home with a cheap
obihai device.
Earbuds + mic if I want to take or make a call (nobody can tell I'm not using a phone). Much like how many use their phones, calls are not that abundant, so texting & other data-using apps tend to be the more common way of communicating. A bigger screen makes a lot of that better/easier IMO.
When I need cellular service, AT&T 2GB, 3 months of service for $25 (so max $100/yr for cell service). However, most of the time, I'm in a wifi zone, so I'm using wifi instead (better/faster/no wireless capacity used). At the end of cell service term, I'm sometimes 2-4 weeks before I actually need a cellular connection again (which for re-activation is on-demand wherever I happen to be). So that $100 MAX can become $75 MAX for a
year's cell service because wifi covers the base for a while in between cellular need.
iPad Mini is great at doubling for phone uses AND brings on that bigger screen for tablet needs too. One device instead of two. Dramatic cost savings vs. anyone who buys both, especially when cell phone service is factored in... but also dramatic savings vs. those who do not also own a tablet but do own a smart phone with service.
Is this option for everyone? Of course not, but it works exceedingly well for my purposes. And I like all the benefits (nobody can even tell that I'm not interacting with them with a phone) without the heavy costs.