Back in the end of 2009, the rumors were all about Google getting into the phone business. Previously Google offered what were called Android Developer Phones, starting with the HTC G1- the beginning of the Android Era. Then came the Original Nexus series starting with the Nexus One- introduced at the beginning of 2010. Nexus Devices are considered as Google's flagship Android products. The history of Android is directly linked with the Nexus series. Each Nexus device was introduced to showcase latest versions of Android. It shows the evolution of Android over the years and how the hardware Android runs on has changed and improved.Also they are the first Android devices to receive updates to the operating system. Let's see the Nexus Smartphone series- starting with the Nexus One to the newly announced Nexus 6.