differentiation feature phone <-> smartphone
	feature phone: single CPU: GSM stack + UI on one CPU
	smartphone: dual CPU: 'digital baseband' + 'application processor'

we will look at some smartphones
	Openmoko GTA02 (FreeRunner)
	E-TEN glofiish M800/X800
	Motorola EZX (A780/A1200/Rokr E6)

Major components
	show GTA02 SimpleComponentDiagram

anatomy of the GSM side:
	CPU (ARM7 for 2G, ARM9 for 3G)
	DSP
	ADC/DAC
	RF PA