This time is the unannounced LG D830 (or LS740, for Sprint?). It has been appeared in Bluetooth SIG and HTML5Test site. You can see the report in the screenshots below, or you can click here and here.
(Click the picture for a larger view)
The screenshot shows the phone is running Android 4.4 KitKat.
By the way, the LS740 has also certified at Bluetooth SIG website. Read more about it here.