The ability to answer calls within your app. You can build call-aware mobile apps that know who's calling, and present relevant information to the user. Clever

The ability to answer calls within your app. You can build call-aware mobile apps that know who's calling, and present relevant information to the user. Cleverly, I've got a prototype app that does just that with the Twilio Client for iOS - I don't think the Twilio part was more than 10 lines of code :)