Two thirds iPhones have latest 2.2.1 firmware
The data, covering one week and provided by Headlight Software, showed no one on 1.x, less than 2% total on 2.0.x, less than 7% on 2.1.x, 26.61% on 2.2, and a whopping 65.49% on the current firmware, 2.2.1 released January 27.
So two-thirds on the latest/greatest firmware, just over a quarter on the previous release. This meants iPhone users try to keep their firmware up to date.
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