Rich Communication Services
Mobile communication protocol / From Wikipedia, the free encyclopedia
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Rich Communication Services (RCS)[1] is a communication protocol between mobile telephone carriers and between phone and carrier, aiming at replacing SMS messages with a text-message system that is richer, provides phonebook polling (for service discovery), and can transmit in-call multimedia. It is part of the broader IP Multimedia Subsystem. Google added support for end-to-end encryption for all chats in their own RCS-based app, Messages.[2][3][4][5][6]
It is also marketed as Advanced Messaging,[7] chat features,[8] joyn, SMSoIP,[9] Message+, and SMS+.[10]
In early 2020, it was estimated that RCS was available from 88 operators in 59 countries with approximately 390 million users per month.[11]