Changes to revision 101209:

Edit by Jon:

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[* black] Removing rear panel gives us a pretty good lookRemove the battery at the iPhone 4's innards.
[* black] Holy battery! The inside of this thing is dominated by its juice-provider.
[* black] It's pretty apparent that real estate was very limited inside the iPhone 4's 115.2 x 58.6 x 9.3 mm footprint.
[* black] You can also see pressure contact on the inner face of the rear panel for what appears to be an antennayour own risk as it says "Authorized Service Provider Only".
[* black] Removing rear panel gives us a pretty good lookRemove the battery at the iPhone 4's innards.
[* black] Holy battery! The inside of this thing is dominated by its juice-provider.
[* black] It's pretty apparent that real estate was very limited inside the iPhone 4's 115.2 x 58.6 x 9.3 mm footprint.
[* black] You can also see pressure contact on the inner face of the rear panel for what appears to be an antennayour own risk as it says "Authorized Service Provider Only".