Nexus One
The Telegraph:

Owners of the first official Google phone, the Nexus One, will not be getting the upgrade, however. Barra said the hardware was simply too old to run the new operating system.

Google launched the Nexus One, which was made by HTC, in January 2010, and closed the phone’s support forum on 1 November last year.

Terlalu tua?

iPhone 4S:
Prosesor 800 MHz dan RAM 512 MB. Dirilis pada bulan Oktober 2011, merupakan smartphone terbaru dari Apple.

Nexus One:
Prosesor 1 GHz dan RAM 512 MB. Dirilis pada bulan Januari 2010.

iPhone 3GS:
Prosesor 600 MHz dan RAM 256 MB. Dirilis pada bulan Juni 2009, dan masih mendapat update software iOS 5.