T-Mobile has announced Advanced Messaging, a refresh of its base messaging service that adds several powerful features. Advanced Messaging is based on Rich Communications Services (RCS), which allows T-Mobile to offer near real-time chatting. Users can see when people are typing responses, see exactly when messages are delivered, and see when messages are read. T-Mobile's Advanced Messaging lets people instantly share photo and video files up to 10MB, as well. Advanced Messaging will first be available on the Samsung Galaxy Core Prime. Owners of the Samsung Galaxy S5 and S6 can enable Advanced Messaging through a simple system update. T-Mobile said more phones will launch with Advanced Messaging throughout the year, and it expects the service to become a standard feature across its product portfolio. T-Mobile Advanced Messaging is built to work across all devices, makers, platforms, and wireless operators. RCS is a standards-based technology and T-Mobile expects to introduce other RCS products in the future. Advanced Messaging will help T-Mobile compete with over-the-top messaging services, such as Facebook, Skype, and WhatsApp, that offer many of the same features