Android 2.2.x Froyo

May 20, 2010 Speed, memory, and performance optimizations[27] Additional application speed improvements, implemented through JIT compilation[28] Integration of Chrome's V8 JavaScript engine into the Browser application Support for the Android Cloud to Device Messaging (C2DM) service, enabling push notifications Improved Microsoft Exchange support, including security policies, auto-discovery, GAL look-up, calendar synchronization and remote wipe Improved application launcher with shortcuts to Phone and Browser applications USB tethering and Wi-Fi hotspot functionality Added an option to disable data access over mobile network Updated Market application with batch and automatic update features[27] Quick switching between multiple keyboard languages and their dictionaries Voice dialing and contact sharing over Bluetooth Support for Bluetooth-enabled car and desk docks Support for numeric and alphanumeric passwords Support for file upload fields in the Browser application[29] Support for installing applications to the expandable memory Adobe Flash support[30] Support for extra-high-PPI screens (320 ppi), such as 4" 720p[31] Gallery allows users to view picture stacks using a zoom gesture 2.2.1 January 18, 2011 Bug fixes, security updates and performance improvements 2.2.2 January 22, 2011 Minor bug fixes, including SMS routing issues that affected the Nexus One.[32] 2.2.3 November 21, 2011 Two security patches