Android 2.2 (Froyo)
Whereas Eclair could be argued as having basic, albeit important, features needed in a cheaper smart phones, Froyo improved on it with even more functions, new user features, developer features, API changes and bug fixes. Froyo brought a polished, more responsive experience with some serious under-the-hood improvements for users to enjoy, largely thanks to the optimized code compiler that provides a 2x-5x performance boost for CPU-heavy code.
The other major differences offered by Froyo include the support for high DPI screens (320 dpi), such as 4" 720P, USB tethering, WiFi hotspot, Adobe Flash 10.1 support, integration of Chrome v8 JS Engine, general speed enhancements and performance optimization.
Android 2.3 (Gingerbread)
Android 2.3 (Gingerbread) introduces many new functions and applications for users to experience a richer, fuller multimedia environment. New platform technologies and APIs for developers were provided to make use of the high resolution large screens, improved processor speed and memory to create a great gaming experience.
Other new features offered by Android 2.3 included a refined UI interface, improved keyboard, improved copy and paste, support for WebM video playback, internet calling and NFC (Near Field Communication). These features come in addition to the popular Android features like multi-tasking and Wi-Fi hotspots, Adobe Flash 10.1, and support for extra high DPI screens.
Android 2.3 also has firmly integrated some application in to the platform like Google Mobile apps and a redesigned YouTube. In a world of connectivity, internet calling is one particularly attractive feature for users. Android 2.3 provides dedicated support for SIP audio and video calling in addition to standard voice calling. Another important aspect in the mobile operating system is the power management. Gingerbread handles it in a better way, managing the applications and daemon application which are running at the background and closing the unnecessary applications that consume more power.
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