My Bluetooth still works. Still connects with my car stereo and my JBL. Was that what you wanted to know about Bluetooth or was there a different implementation of Bluetooth you had questions about?I mean, WP 8.1 disabled Bluetooth, which was a Nokia implementation, so "it's an OS, it doesn't touch firmware" isn't actually true. Thank you, Qtweeder, but I'd prefer to hear from someone who has the update and has tested it.