Jul 07 2010
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iPhone 4 Teardown - iFixit
Apple has gone a step further and tuned the phone to utilize whichever network band is less congested or has the least interference for the best signal quality, regardless of the actual signal strength. Early reports suggest this feature, while buggy in its early stages, will greatly improve the phone’s reliability on AT&T’s fragile network. http://www.ifixit.com/Teardown/iPhone-4-Teardown/3130/
