Messages app brings you the future of messaging called Rich Communication Services (RCS). Using the same app you can send both SMS and Chat messages. SMS service can be used from any SIM by setting Messages as your default messaging app. Chat messages can be sent using Jio SIM only to any other RCS capable (Messages/ Jio4GVoice app) user. You can enjoy the following exciting features of chat using Messages 1. Share File 2. Share Contacts 3. Share Location 4. Group Chat 5. Video/Voice Message 6.