This iPhone 4 teardown guide at iFixit has been found to be exceptionally cool by the ismashphone staff, which is why we are sharing it with you here!
The world's most wanted device is now in the hands of tinkerers!
The all-new iPhone 4 features upgrades from the 3GS including:
A redesigned glass & stainless steel body.
3.5 mm slimmer in width and 3 mm thinner in depth than the 3GS.
Choice of coloring! Black! The white you'll have to wait for.
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
The design is a dramatic departure from the aluminum and plastic of iPhone's past.
It's has stainless steel bezels around the phone's perimeter, these double as both structural supports and antennas to boost reception.
Wonder if it is as crap at absorbing shocks as the 3GS?
In another departure, the storage capacity is not etched on the outer case of the iPhone 4.
Also, a 32 GB iPhone 4 does not give you a full 32 GB. It has an actual capacity of 29.06 GB. With 301 MB of "other" data stored in memory, this leaves the user with 28.77 GB of free space.
The iPhone 4 comes preinstalled with the newly released iPhone OS 4, build 8A293.
The iPhone 4 is Model A1332, a lower number than the A1337 iPad 3G!
Like the iPhone 3G and 3GS, there are two silver Phillips #00 screws at the bottom of the phone, but unlike the 3G and 3GS, removing the screws releases the rear case, not the front glass.
This design makes replacing the rear panel trivial, but means replacing the front glass will likely be more challenging.
Because, you know, that's helpful.
Removing rear panel gives us a good look at the iPhone 4's innards. The inside of this thing is dominated by the battery.
Space is limited! It is tight in here!
You can see the antenna's pressure contact on the inner face of the rear panel.
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. The battery is not soldered to the logic board.
The plastic pull tab for the battery says "Authorized Service Provider Only."
The EMI shield comes off after four screws are removed, revealing lots of important connectors.
The logic board is heavily embedded under wires and EMI shields.
The iPhone 3GS and iPad were both equipped with 256 MB of RAM, the iPhone 4 has 512 MB. Do we need to tell why this is good? The increase in RAM allows for a larger amount of cached data allowing for a smoother, faster user experience.
In the corner is the iPhone 4's vibrator motors.
Removing one of the many connectors on the logic board.
In usage, the phone is warmer on the right side. It makes sense, as the logic board is located along the right side of the phone.
The iPhone 4's a rear-facing 5 MP camera with 720p video at 30 FPS, tap to focus feature, and LED flash. It's a huge upgrade from the 3.2 MP camera found in the iPhone 3GS.
Removing the lower antenna/speaker enclosure from the bottom of the phone.
The improved audio chamber aids in clarifying sounds, including calls via speakerphone as well as music played through the speaker inside this housing.
Apple hasn't made taking the iPhone 4 apart very hard.
Removing the logic board.
The unusual shape and small size of the logic board shows just how costly real estate is inside the phone.
In what can only be described as a work of genius, Apple has integrated the UMTS, GSM, GPS, Wi-Fi, and Bluetooth antennas into the stainless steel inner frame.
The dual purpose stainless steel inner frame/antenna assembly addresses the two biggest flaws in previous iterations of the iPhone; dropped calls and lack of reception.
Apple has tuned the phone to utilize whichever network band is less congested, has the least interference for the best signal quality, regardless of actual signal strength. Early reports suggest this will improve the phone's reliability on AT&T's network.
With the EMI shields off, we can get a look at what makes this beast roar.
Lurking deep within the phone, the A4 processor, manufactured by Samsung, is the centralized unit that provides the iPhone 4 with the much needed computing power.
Replacing the Samsung S5PC100 ARM A8 600 MHz CPU used in the 3GS, the new iPhone uses the 1 GHz ARM Cortex A8 core, much like its bigger sibling, the iPad.
The new Samsung Wave S8500 smartphone uses the same Cortex A8 core!
Just to the left of the A4 package, the AGD1 is the new 3 axis gyroscope that we believe is designed and manufactured by ST Micro for Apple. The package marks on this device do not appear to be the currently available commercial part, L3G4200D. The commercial version of this gyroscope is yet to be released ‚Äî Apple got first dibs on it.
Top of logic board:
Skyworks SKY77542 Tx‚ÄìRx iPAC‚Ñ¢ FEM for Dual-Band GSM/GPRS: 880‚Äì915 MHz and 1710‚Äì1785 MHz bands.
Skyworks SKY77541 GSM/GRPS Front End Module
STMicro STM33DH 3-axis accelerometer
On the back:
Samsung K9PFG08 flash memory
Cirrus Logic 338S0589 audio codec (Apple branded), same as the iPad.
AKM8975 – newest magnetic sensor that promises to improve the performance over the prior generation.
Texas Instruments 343S0499 Touch Screen Controller
36MY1EE Numonyx NOR and mobile DDR
Wi-Fi, Bluetooth, and GPS are all provided by Broadcom and located beneath EMI shields on the front side of the board.
Broadcom BCM4329FKUBG 802.11n with Bluetooth 2.1 + EDR and FM receiver.
Broadcom BCM4750IUB8 single-chip GPS receiver.
Up next the second microphone; used to cut out ambient noise and improve sound quality when talking on the phone.
The front-facing VGA camera.
While the 5 megapixel camera on the rear of the iPhone 4 is ideal for video recording, the smaller camera on the front optimizes use of Apple's FaceTime for mobile-to-mobile video calls.
The front panel comes off without too much trouble.
The stainless steel body is a marvel of gadget engineering.
The front glass panel of the iPhone is constructed of Corning Gorilla Glass, a chemically strengthened alkali-aluminosilicate thin sheet glass that is reported to be 20 times stiffer and 30 times harder than plastic.
Gorilla Glass holds many advantages as the iPhone 4's front panel including its high resistance to wear and increased strength from an ion-exchange chemical strengthening process.
LED Backlight for the LCD.
The LCD panel is securely glued to the glass and digitizer. It appears that if you break the glass, you'll have to replace the glass, digitizer, and LCD as a single assembly.
The electronic home button switch is attached directly to the home button itself.
The 30-pin dock connector is where we would usually expect it to be: at the bottom of the iPhone.
The primary microphone is also at the bottom of the phone.
Apple is following in the footsteps of the Nexus One by using dual microphones to help improve audio quality and suppress background noise.
Interestingly, the two microphones are positioned at the two far ends of the phone. The microphone at the top of the iPhone is most likely utilized for capturing background noise to be analyzed by internal circuitry and used to cancel any noise put into the main microphone other than the user's voice.
The final layout shot.
Thanks to iFixit for this step by step disassembly. You guys rock!