Documents seen on the Federal Communications Commission’s web site reveal information about an unannounced device from LG. According to the documents, the LG LS831 supports CDMA in the EMSR band (800MHz), which only Sprint uses. One of the documents is also called the “Sprint Nextel Waiver”, further earmarking the LS831 for Sprint. The device also supports CDMA in the 1900MHz band, as well as Bluetooth. Photos that accompany the FCC documents show a Windows Phone device (based on button configuration and labels) and LG branding, and the draft user manual refers to Windows Phone controls and user interface elements, such as the Start button. The images also reveal that the LG LS831 has a 5-megapixel camera, user-facing camera, headphone jack, and microUSB port. Neither LG nor Sprint has announced this device. Sprint hasn’t brought a Windows Phone device to market since the HTC Arrive in early 2011.