How RCS (Rich Communication Services) Works
RCS (Rich Communication Services) is a communication protocol designed to enhance and replace the traditional SMS (Short Message Service) messaging system on mobile devices. It aims to provide a richer and more interactive messaging experience similar to popular messaging apps like WhatsApp, Facebook Messenger, and iMessage. RCS offers features like read receipts, typing indicators, high-resolution images and videos, group chats, and more.

Key features of RCS messaging include:
- Read Receipts: Users can see when their messages have been delivered and read by the recipient.
- Typing Indicators: You can see when the other person is typing a response.
- Group Chats: RCS supports group chats with multimedia sharing and other features.
- High-Quality Media: You can send high-resolution images and videos without the limitations of traditional MMS (Multimedia Messaging Service).
- File Sharing: RCS allows the sharing of various file types, not just images and videos.
- Interactive Content: RCS enables interactive content like buttons, suggested replies, and more.
- Enhanced Calling: RCS can also integrate with voice and video calling.
- Secure: Like SMS, RCS is transmitted over cellular networks, but it can be more secure due to encryption standards.
- It's important to note that RCS requires support from both the user's device and the carrier network. For RCS to work seamlessly, both the sender's and recipient's devices need to support RCS, and their respective carrier networks must also have RCS infrastructure in place.
- As of my last knowledge update in September 2021, RCS adoption was somewhat fragmented, with various carriers and device manufacturers implementing RCS at different paces. Google has also been working to promote RCS through its "Chat" feature in Android Messages. However, the adoption and implementation of RCS might have progressed since then, so I recommend checking with your mobile carrier and device manufacturer for the most up-to-date information on RCS availability and support.