Combo radio device
The combo radio device, used to provide the phone with WiFi and Bluetooth (no FM radio in the Apple specs), is a slight variant on the flagship Broadcom BCM4334 seen in the iPhone 5 and many other smartphones. This time, it's called the BCM43342. The layout of the device, packaged in a Murata MCM (marked 339S0205), is shrunk slightly over the original BCM4334.
The die marks on the Broadcom chips: