Which Cisco mobile end point application provides instant messaging, voice and video calls, voice messaging, desktop sharing, conferencing, and presence?

Cisco Jabber is a unified communications client that integrates instant messaging, presence, voice and video calling, voicemail, and desktop sharing capabilities across various devices, including mobile platforms, providing a comprehensive collaboration experience.

Cisco Expressway is a gateway technology for secure remote access to collaboration services, not an end-user client application.

While Cisco Webex (formerly Webex Teams) offers many of these features, Jabber is historically known as the dedicated unified communications client that bundles all these specific features into a single mobile endpoint application.

Cisco TelePresence MX series refers to physical room-based video conferencing systems, not a mobile endpoint application.