BLU Products' new flagship device is only 0.2 inches thick and has a case made of aluminum magnesium alloy, comes with a quad-core processor and 4G LTE connectivity, but sells unlocked for only $199 USD.
http://www.notebookcheck.net/Blu-Vivo-Air-offers-4G-LTE-and-a-quad-core-processor-for-less-than-200-USD.134187.0.html