> Right now, when people on iOS and Android message each other, the service falls back to SMS — photos and videos are sent at a lower quality, messages are shortened, and importantly, conversations are not end-to-end encrypted like they are in iMessage.<p>They will still not be end-to-end encrypted in RCS. They will just be encrypted in transit, but your carrier (or whoever is running whatever server in an RCS architecture) can read all your messages.<p>There is talk that Google's got some kind of extension that adds E2EE to RCS but others will be well informed on it and can add to my message.<p>I'm blissfully happy with iMessage. For the non-Apple people, we've been using WhatsApp for nearly a decade.<p>But what does this do for OTP messages, etc? I'll have to check if Twilio automatically uses RCS if you send a message to a supported number. I do like the idea of all messages being encrypted in transit at least (SMS is not).