Android 2.2.3 Froyo (API level 8)
Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.
You can add widgets to the home screen. This allows you to have more flexibility and to see information at a glance, without going into the app.
With a search browser app, you can surf the internet from your device.
It can be updated over the air (OTA) w/o connecting to a computer
All your contacts and calendar dates are synced over-the-air.
With a large enough data plan, you could cancel your home internet and use the device as a hotspot.
The OS has a feature for tracking the position of a mobile device. This feature is particularly useful if your phone gets stolen or if you lose it.
Free navigation software with free map data and updates included, no need to buy an dedicated navigation device.
You can use your voice to control key functions of the device and you can easily access your device without pushing any button.