Signal does not control delivery of SMS and can not prevent spam being sent via SMS.SMS is not used much beyond the US and a few other western countries, and its use is declining.Not all people understand the difference between a Signal message and an SMS message, and this led to potentially dangerous incidents where people sent messages they thought were private via SMS. SMS sends your messages in the clear, so your telecom or anyone snooping on your traffic could read them. SMS is not secure or private, and that means it's fundamentally not compatible with Signal.We did not make this choice lightly, but we do believe it is necessary to ensure that Signal meets the highest privacy standards for the future. Here, we review the reasons we chose to remove SMS. All Signal messages are private and will continue to work.To move SMS to another messaging app, follow steps here. Signal is removing SMS support in Android, which we announced here.SMS messages are different than Signal messages.Blog post for Signal's approach to user data.How to know if your communication is private?.

Texting signal