Android 2.0/2.1(Eclair)

This version of the Android operating system known as the Eclair was released from 26th October 2009 to 12th January 2010.

The main features of this version were,
Multiple contacts could be added to a device for email and contact synchronization, including exchange accounts.
Developers could create sync adapters that provide synchronization with additional data sources.
Quick contact allows quick access to a contact's information and communication modes. For example just tapping the photo of the contact, you can get the various modes of contacting the user like email, sms, call, etc.

Email exchange support , combined inbox to browse email from multiple accounts in one page. Search functionality for all saved SMS and MMS and also auto delete conversations when a definite limit is reached.

Camera
Built-in flash support
Digital zoom
Scene mode
White balance
Color effect
Macro focus

The virtual keyboard layout was improved to ensured correct typing and improving the typing speed. Also the framework's multi touch ensures that key presses aren't missed when typing rapidly with two fingers.

Browser
Refreshed UI with actionable browser URL bar enables users to directly tap the address bar for instant searches and navigation.
Bookmarks with web page thumbnails.
Support for double-tap zoom.
Support for HTML5:
Database API support, for client-side databases using SQL.
Application cache support, for offline applications.
Geolocation API support, to provide location information about the device.