This is one of my vintage pagers that I own that "Still Receives Messages" it's connected to (Critico) who bought Pageone/Mercury Minicall network. I have tested the pager again today using bother Numeric and Alphanumeric messages. Like with the old service you call the number, You then have the option to send a Numeric message and press # or Hold the line for an operator who takes a full Alphanumeric message. A contract would cost you £25 a month plus and this is totally free with no contact, You are welcome to see the pager working first before purchasing.
eBay