Ok then, tell me how many companies are actively maintaining CDMA/Upgrading systems in China/USA/NH.
From the looks of it only China has China Telecom, and they're only buying CDMA networks off other companies.
And according to Google Stats, the biggest 15 mobile phone companies (ranked by total subscribers) use GSM/GSM Derivative/Evolution as their primary radio type. SO please, tell my why CDMA is worth investing into currently. Its dead in an entire hemisphere (and if you call Australia unimportant you're thicker than concrete) and some of the biggest Cell Phone providers couldn't care for it.
On top of what everyone else has said, Apple is an American company. The American market is its biggest and comes first. If you told them they had a market of 90 million potential customers for ANY product, that product would be worth developing. Moreover, when you have a one carrier situation, you get a multitude of reasons people won't switch to that carrier, real or imagined. By adding a second carrier, you can get a lot of those holdouts, plus you can slow Android's growth when people are adopting it because they feel they have no other choice.
cdma = no voice & data at the same time a key feature of the iphone.
Not true anymore. Current CDMA standard supports SVDO. Phone maker only has to build it in. I've heard conflicting opinions about what is needed for carrier to support it, but it's still very minimal. Not a roadblock anymore.