Changes to revision 101217:

Edit by Jon:

In Patrol

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[* black] Removing the lower antenna/speaker enclosure from the bottom of the phone.
[* black] The improved audio chamber aids in clarifying sounds leaving the iPhone, including calls via speakerphone as well as music played through the speaker inside this housing.
[* black] Apple hasn't made taking the iPhone 4 apart very hard so far: no 5-point Torx bits or fragile clips to be seen.