Re: The iPhone thread
Later firmwares retain the 'base form' as they are merely current versions of the base product. The current iOS is the 'base form' for the current devices, similar to a windows update, it gives you the base functionality of the OS and the bug fixes etc. If you were to buy an iPhone 3GS at it's inception you would get iOS 3.0 - now you would get 4.3.5 - Same device, both factory firmware versions, just one is updated based on advances / bug fixes and the firmware is updatable by the end user.
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