If you use SMS then you are sending not just your metadata, but the content of your messages in cleartext to your provider and the recipient’s, and depending on

If you use SMS then you are sending not just your metadata, but the content of your messages in cleartext to your provider and the recipient’s, and depending on where you/your recipient lives, potentially the authorities too. I’m all for living under a privacy rock, but WhatsApp is a much better rock than SMS.