Even the hardware manufacturers expect big improvements in every release. Integrating a new release, testing and verifying correct operation of a cell phone is

Even the hardware manufacturers expect big improvements in every release. Integrating a new release, testing and verifying correct operation of a cell phone is a long and costly procedure. This is why many phones still don't have an update for 2.2. So cell phone makes would prever big upgrades with many new features -- but release infrequently. The "release early, release often" mantra just doesn't suit this type of market.