For several years now I operate a sysmoBTS 1002 at my home, along with a server that runs the requisite suite of osmo-* processes. The result is my own self-made GSM signal at my home; I call this network Themyscira Wireless, named after the fictional home of Wonder Woman. This home network of mine is interconnected with real PSTN via SIP, such that my ThemWi phone has a real phone number, can call any outside numbers and can receive calls from the outside world. For the past 3 years or so I’ve been using this home GSM system as my primary personal phone - while I do have a traditional POTS land line as well and will never give it up willingly either, ThemWi GSM is more convenient most of the time.