Last I checked signal still required a phone number to use so it is an instant deal breaker for a lot of people. I have 3 kids I communicate with but they don’t

Last I checked signal still required a phone number to use so it is an instant deal breaker for a lot of people. I have 3 kids I communicate with but they don’t have a cell number just use wifi when they can. If I could use signal with them I would. Instead I use Wire since it seems secure and doesn’t require a phone number. I can only imagine there are lots of other people with kids in my situation.