Write an Android application

We need RCS Mobile Application like ( VIBER , Whatsaapp and so on ) fully compliant with GSMA RCS5.1 specs, comprising a suite of RCS Apps for smartphones, tablets, PC and Web browsers, as well as a full-feature RCS Application Server – the key elements required for fast time-to-market and agile evolution of RCS services. RCS5.1 is the latest specification from GSMA for the standard of Rich Communications. It represents the industry proposition for IP messaging and IP voice and video, designed to combat the erosion of revenues driven by the OTT Apps like WhatsApp, Viber, Line, Skype, WeChat and many others. RCS is future-proof since it leverages the same IMS investments of VoLTE and it creates the basis for an all-IP world of communication. Key differentiation for the WIT RCS Suite: Strong alignment with the evolution of the RCS specs, assuring a future-proof solution Flexibility to deploy in either pre-IMS or IMS-based architectures Apps and Platform from the same vendor resulting in the best user experience Faster time-to-market with lower cost