The RCS protocol is coming to the iPhone with the latest iOS update. — Apple
Apple's iOS 18 is bringing the RCS protocol to the Messages application, paving the way for iPhone users to enjoy a much more comprehensive messaging service than simply sending and receiving SMS and MMS messages. Unfortunately, not everyone will be able to benefit from the service until all network operators support this technology.
Rich Communication Services (RCS) is an enhanced messaging protocol designed to replace traditional SMS and MMS messaging. Today, it offers capabilities similar to those found on applications such as WhatsApp, but directly in the phone's native messaging application.