In these cases you could use a https://jmp.chat/ phone number.
No smartphone is required for JMP, only an XMPP client (see https://news.ycombinator.com/item?id=16352711 for some client options).
No smartphone is required for JMP, only an XMPP client (see https://news.ycombinator.com/item?id=16352711 for some client options).