The front and back of the Nexus 4 are made entirely of glass. Inside the Nexus 4 sits a Snapdragon S4 Pro from Qualcomm, which is clocked at 1.5 GHz and has four cores. The Nexus 4 also hosts 2 gigabytes of RAM and is available in two variants, one with 8 gigabytes and one with 16 gigabytes of internal memory. It was shipped with Android 4.2 and has been available since November 2012 in the Google Play Store and retail outlets. It was such a commercial success that it sold out very quickly, in large part to its $199/$249 price tag, and has remained a solid benchmark phone.