Android 2.0–2.1 Eclair is a discontinued version of the Android mobile operating system developed by Google. Unveiled on October 26, 2009, Android 2.1 builds upon the significant changes made by Android Donut. Two major additions in Eclair were support for near field communication (NFC) (used in mobile payment solutions) and session initiation protocol (SIP) (used in VoIP internet telephony). More: