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Example: A Cellphone.

One of the two main PCBs of an Apple iPhone. Main SoC is top, left-centre.

A modern mobile phone contains eight or more radio tranceivers, counting the various cellphone standards, GPS, WiFi, near-field and Bluetooth. For the Apple iPhones, all use off-SoC mixers and some use on-SoC ADC/DAC. Another »iPhone teardown link

An Apple SoC - Two ARM and 3 GPU cores. Made by arch rival Samsung.

Further examples: »iFixit Teardowns »iPhone Dissected »Samsung Galaxy»Numonyx Flash Datasheet

Cellphone physical components - bill of materials:

Main SoC - Application Processor, Caches and DRAM
Display (touch sensitive) + Keypad + Misc buttons
Audio ringers and speakers, microphone(s) (noise cancelling),
Infra-red IRDA port
Multi-media codecs (A/V capture and replay in several formats)
Radio Interfaces: GSM (three or four bands), BlueTooth, 802.11, GPS, Nearfield, .... plus antennas.
Power Management: Battery Control, Processor Speed, on/off/flight modes.
Front and Rear Cameras, Flash/Torch and ambient light sensor,
Memory card slot,
Physical connectors: USB, Power, Headset,
Case, Battery and PCBs
Java VM and Operating System.