Samsung Galaxy Nexus was released in 2011. The Galaxy Nexus has a 4.65” HD Super AMOLED 720p display featuring the PenTile matrix and curved glass. It also has NFC support to be able to work with Google Wallet and as Android Beam. The dual-core TI OMAP 4460 in the Galaxy Nexus clocks in at 1.2GHz, and is backed by 1 GB of RAM.
Samsung Galaxy Nexus did not receive official Lollipop update so it was pretty obvious that it would not receive Android Marshmallow update too. But the custom ROM community have developed AOSP ROM for Galaxy Nexus which will update this device to Android 6.0. Follow the guide below.