The large orange cable connects the WiFi antenna (upper left) to the logic board.

The size, shape, and characteristics of the cable prevent external noise from interfering with the digital signals as they travel along the device.

At the top of the picture above the battery is a metal cover. Underneath the cover is a Broadcom BCM4325 Wi-Fi and Bluetooth chip. Yes, that's right, Bluetooth! Apple has said nothing of this publicly.

This particular bluetooth chipset supports BT2.1+EDR. No word yet on whether the one Apple included supports A2DP, which would enable stereo headphones.

This chipset also offers FM support, but Apple has displayed zero interest in FM historically, and there are no signs of that trend changing.

Part numbers: BCM4325GKWBG CD0825 B76332 P40 SF