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Android 1.0
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Android 1.1
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It includes more and different features for the users and changes also.
Android 1.5 -
It added support for some smartphones, it also add screen sizes and battery usage indicator.
Android 1.6 -
They were made significant changes in Android 1.6 version.
Android 2.0-2.1 -
The most importan changes in this was the USB tethering and the Wi-Fi hotspot functionality.
Android 2.2-2.2.3 -
It introduced support for near field communication and Session Initiation Protocol.
Android 2.3-2.3.7 -
It was designed for devices with larger screen sizes especially tablets. Honeycomb introduced a new system called holographic user interface and it also included main features such as multitasking, notifications and widgets.
Android 3.0-3.2.3 -
They were significant changes for tablets to create a uniform platform for both smatphones and tablets.
Android 4.0-4.0.4 -
There are three major point releases.
They have improvements designed to give the operating system a smoother and more responsive feel.
They were also improvements to the notifications system.
Android 4.1-4.3.1 -
It is focused primarily on optimizing the operating system for improved performance.
Android 4.4-4.4.4 -
It is a redesigned user interface built around a design language which has the name of Material Design.
Android 5.0-5.1.1 -
It is bassed on improving users experience. Introduced new permissions.
Android 6.0-6.0.1 -
The version was released with Nexus devices wich were the first ones receiving the update.
Nougat introduces some changes to the operating system. It includes the ability to display multiple apps, it includes also support for inline replies to notifications.
Android 7.0-7.1.1
