Wednesday, August 4, 2010

มาแกะ Iphone4 ดูข้างในกัน (iPhone 4 Teardown)

Step 1 — iPhone 4 Teardown

  • The world's most wanted device is now in the hands of the world's most foremost tinkerers!

  • The all-new iPhone 4 features upgrades from the 3GS including:

    • A redesigned glass & stainless steel body that shaves 3.5 mm off the width and is 3 mm thinner than the 3GS.

    • Choice of black or white coloring

    • Retina display featuring twice the pixel density of the 3GS

    • iOS 4 for multi-tasking

    • 5 MP, 720p capturing rear-facing and VGA front-facing cameras

Step 2

  • The iPhone 4's design is a dramatic departure from the aluminum and plastic drenched days that have plagued the iPhone in the past.

  • The rugged stainless steel bezels around the iPhone 4's perimeter double as both structural supports and antennas to boost reception.

    • Only time will tell if they absorb shock as poorly as the iPhone 3GS.

  • Shameless plug:

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    • We also sell useful things, like Mac parts, iPad parts, and tools.

Step 3

  • An iPhone first: Interestingly enough, the storage capacity is not etched on the outer case of the iPhone 4.

  • We'd expect our 32 GB iPhone 4 to fulfill its promise and give us, well, 32 GB. Unfortunately it has an actual capacity of 29.06 GB.

    • Given the fact that 301 MB of "other" data is being stored in memory, this leaves the user with 28.77 GB of free space.

  • In terms of OS, the iPhone 4 comes preinstalled with the newly released iPhone OS 4, build 8A293.

  • The iPhone 4 is Model A1332. Interestingly, that's a lower number than the A1337 iPad 3G.

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Step 4

  • Like the iPhone 3G and 3GS, there are two silver Phillips #00 screws at the bottom of the phone.

  • In a departure from the design of the 3G and 3GS, removing the screws releases the rear case, not the front glass.

  • This design makes replacing the rear panel trivial, but unfortunately means that replacing the front glass will likely be rather challenging.

Step 5

  • Removing rear panel gives us a pretty good look at the iPhone 4's innards.

  • Holy battery! The inside of this thing is dominated by its juice-provider.

  • 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.

  • You can also see the antenna's pressure contact on the inner face of the rear panel.

Step 6

  • Luckily, the battery can be easily removed once the back panel assembly is out of the way.

  • The 3.7V 1420 mAh Li-Polymer battery allows for up to 7 hours of talk time on 3G or up to 14 hours on 2G.

  • The battery connector is different than the one in the 3G and 3GS. Fortunately, the battery is not soldered to the logic board.

  • The plastic pull tab for the battery says "Authorized Service Provider Only."

Step 7

  • No EMI shield will stand between us and the innards of this iPhone 4!

  • The EMI shield comes off after four screws are removed to reveal lots of important connectors.

Step 8

  • The logic board is heavily embedded under wires and EMI shields.

  • While we're not too busy, let's talk RAM. Unlike the iPhone 3GS and iPad, which are both equipped with 256 MB, the iPhone 4 has a whopping 512 MB!

  • The increase in RAM allows for a larger amount of cached data allowing for a smoother and faster user experience.

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