Google’s Nexus One has too many best features including 5 megapixels camera, geotagging and Android 2.1 platform. But another cool feature of Nexus One is for Gmail. You can setup multiple Gmail on the Nexus One and swith between them without quiting the application.

Also, you can take advantage the Undo feature by which you can retrieve a message when you have hit archive or delete a message.

Also Nexus One add two more best features in Gmail application :

Voice Input – Select the contacts or write email using Voice commands.

Quick Contact Badge – Just press the Contact Status Icon and you will be showed a handy box through you can choose by which method you want to communicate either via email, sms, chat and Facebook.