Nexus 4 is powered by a 1.5 GHz quad-core Qualcomm Snapdragon S4 Pro processor, featuring four Krait cores and the class-leading Adreno 320 GPU. In addition to the fast processor, the Nexus 4 also packs 2 GB of RAM and either 8 or 16 GB of internal storage. The device also features a 4.7″ 720p display, delivering 320 ppi.
Google rolled out the official Android 5.1.1 for the Nexus tablets some days back. Recently they added the factory images for the Nexus smartphones and soon the OTA updates will start. But instead of waiting for the OTA updates, you can install it manually via the factory image. Follow the guide below.