With a SIM card slot added to the sides, the Surface 2 will be able to use the 4G LTE data connectivity offered by the mobile operator, like AT&T for instance, and lets you use internet on-the-go. Windows RT, the operating system that runs on this device, was initially touted to support mobile networks and data, with special controls for data limiting and control, but we are only now getting to see the hardware that supports it.
The Surface 2 has a 10.1 inch 1920×1080 screen, a fast Tegra 4 processor and overall has improved a lot from its predecessor, along with the necessary software updates. It also now has better front and rear facing cameras, a sleeker frame and lesser weight, with a two stage kickstand making the “lappability” easier. With mobile connectivity added to this list, the Surface 2 gains yet another highly requested functionality and might just setting us up for a smaller Surface with LTE, that might launch soon.
Source Surface Blogs