Anandtech has studied apple's new 4.01 OS update, and found that the new formula for displaying bars covers a much greater dynamic range. That is, it will show lower and higher signals than before, assigning those more extreme values as 1 and 5 bars. This means it'll require more signal to show higher bars, with the result of the iPhone showing five bars less often, but also showing "no service" less often, too. [anandtech]
Anandtech On The iPhone 4.01 Update: The Bars Show Higher, Lower Signals
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