It used to have SMS support but they yanked it maybe a year or so ago. The big issue on the user end was, if someone deleted Signal and you used Signal for your

It used to have SMS support but they yanked it maybe a year or so ago. The big issue on the user end was, if someone deleted Signal and you used Signal for your SMS, it would keep sending them signal messages and not SMS. So you were left not realizing you were texting essentially a dead number.