Apple stated that this iPhone was the thinest smartphone on the market. I have to admit that that’s true. This phone is really thin. And also very powerful.
Since the Apple introduced the original iPhone back in 2007, they took a huge leap forward with this. It inside design is really brilliant too.
First significant change, it’s easy for the user to disassemble his phone. Yeap, that’s right. Changing the battery is only 2 screws away. And the battery is no more soldered ! There is now a connector which you can easily unplug.
Yes it’s really that easy. We can see that the battery takes a lot of space in there. It’s the only component we are unable to miniaturize. It’s really huge. It allows the user to use his phone intensely during 10 hours with a high definition display and multitasking !
The iPhone is now working with 3.7 V and a battery with 5.25 Whr !
And here is the camera. The 5MP camera shooting 5MP pictures and filming at the incredible rate of 30FPS with 720p HD. Don’t forget the LED flash and the noise-canceling microphone.
Processor speed: Goodbye Samsung S5PC100 ARM A8 600MHz. This iPhone is now equal with the Nexus One being powered by a 1Ghz ARM Cortex A8 core. Called Apple A4, sibling of the iPad processor. On this board you can also see on the left the Gyroscope ship with isn’t commercialized. It’s only build for Apple.
Other important piece here is the micro-sim card reader.
Communication Board:
Yes there are also a lot of changes on this. What’s new ? Single-chip GPS receiver (Broadcom BCM4750IUB8) for better signal and a multi-function chip (Broadcom BCM4329FKUBG – 802.11n Wi-Fi, Bluetooth 2.1 EDR and FM receiver ! You could be able to listen to the radio. Or streaming to the radio ?!? Crazy Apple 
)
Logic Board
Like you would expect it :
- Samsung K9PFG08 flash memory
-Cirrus Logic 338S0589 audio codec (Apple branded). This is the same part as in 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
Original Teardown by iFixit
Now that you know what it is made of, enjoy your iPhone 4 ! Brilliant beast !
