No I am fully aware. We used to process credit cards over the AMPS (analog) mobile phone network - and this is also how EKGs were sent by EMTs in that timeframe - prior to that in the 1970s they used a dedicated chunk of 70cm spectrum. The items listed are a seriously small amount of data. Sure it’s a bit cheaper now - but we were integrating GPRS modules into embedded hardware in the 90s, it wasn’t that expensive.
It was ubiquitous enough in urban and suburban areas in the US and Canada. The coverage of AMPS was solid, what was limited was the bandwidth and capacity - but there were far fewer users. Coverage in remote rural areas was poorer but still - in the late 80s it was being used for EMT transmittal of telemetry. And as stated using dedicated spectrum this is a 1970s tech. On rereading the OP I am more puzzled what they are talking about because it seems like they are talking about EMT monitoring as opposed to continuous home monitoring - the former we have been doing for 50 years.
