Microsoft on Monday announced the Surface 2 with AT&T 4G LTE support, a 64GB version of the Surface 2 tablet that also features mobile broadband. The device is available now for $679; given that the Surface 2 without LTE retails for $549, you’re paying an extra $130 to ensure you’re (almost) always online. Curiously, Microsoft chose to announce the device after it already appeared in its retail stores and at Best Buy,last week on March 11. Nevertheless, all the details are now available, and we can see exactly what the company wants to share about its latest device. In addition to mobile broadband, the extra cost on top of the Surface 2 will also get you free Skype calling to landlines in more than 60 countries for one year, unlimited Skype Wi-Fi (which Microsoft touts is available at over 2 million hot spots worldwide) for one year, and 200GB of free OneDrive storage for two years.