Rich Communication Services (RCS) is a protocol used for delivering rich messages from verified senders over internet connections or carrier networks. With the support of RCS by both iOS and Android, businesses can upgrade their traditional SMS communication to branded messaging through RCS. Twilio recently launched its public beta for RCS messaging, allowing businesses to create an RCS Sender profile, set up test recipients, send first RCS messages, track message delivery insights, and submit applications for sender compliance review.