Originally Posted by gwoodpecker
Maybe that's because the rest of the planet (Europe, for example) uses GSM / EDGE and not the other more or less proprietary formats (CDMA)? Apple is smart enough to use the technology that's used in most countries around the globe (instead of being US-centric!) and therefore they will sell more iPhones because of that. Really easy!
Oh, one more thing: why do you think it is a quad-band mobile phone? Certainly not for selling it in the U.S. alone...
It would be nice if people who posted about cell phone technology actually had a clue. GSM/EDGE is dated technology. Everyone in the 1st world was supposed to have already gone to 3G by now, which in all cases
uses CDMA-based technologies. In the US and Asia, other technologies (CDMA-based 3G) are at least as prevalent as GSM.
GSM and EDGE are higher level protocols. CDMA is, for lack of simpler nomenclature, a type of modulation. What is essentially GSM-3G uses CDMA signalling. Europe uses GSM/EDGE because it's home grown, but at the end of the day GSM/EDGE can't pack nearly as many users per cell as US 3G (EVDO) or US 2G (IS-95), it has much higher signal-to-noise as cells get more filled, and it doesn't deal as well with signal reflections. By modern standards, it's junk technology.
It's a quad band GSM phone because the commodity part they happened to buy, which acts as the cellular baseband, happens to support quad band GSM. Go look at TI's OMAP site: everything is deeply integrated. GSM/EDGE has the one benefit that as older technology, it's cheap, ubiquitous, and easy to implement. This, plus the fact that Cingular was obviously the most receptive ("I agreed without ever seeing the phone"), are key reasons to why the current model is GSM/EDGE. There's really no way that the iPhone won't be upgraded to CDMA, since it will have to be in order for it to be 3G.