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
This phone, isn't LTE -- HSPA+ only. Still a good little device with snappy menus and awesome build quality, but the site you reference says HSPA+ right on the page.
If you look at it more carefully you'll see a 4G there as well. Just above HSPA+. It's also in the official manual, but it may be a typo/mistake on their part.