Hello, I hope it's okay to ask this here. I was wondering if it would cost extra money to text people internationally using signal. I know with wicker it doesn't cost money to message people, is that the same with signal? Signal used phone numbers that why I ask.
Signal piggy backs on your SMS service. If you're just sending messages to anyone, then it's an unencrypted SMS, and if they're overseas, you'll have to pay international SMS rates.
If you're messaging another Signal user however, then it is encrypted IM, and doesn't use the SMS service at all.