In-cell screen: LG Display, Japan Dispaly (joint venture company of Sony, Toshiba and Hitachi Mobile Display), Sharp (recently came out to solve the problem of capacity and yield, and started to supply, so it is estimated that I am too busy to find Guo Taiming's financing/restructuring company).
Note: There is no Samsung. I wonder if it has anything to do with the lawsuit. Samsung's production capacity and technology on small and medium-sized panels are good. At least the new Macbook Retina uses Samsung's screen, and LG's screen is said to have a ghost.
A6 chip: Apple design, embedded ARM kernel, Samsung dram, Samsung OEM.
Batteries: Some are produced by Sony, and some are OEM by domestic manufacturers.
Wireless switch: Murata Co., Ltd. is from Japan. I don't know much about this company. You can often see many advertisements of his family at the airport.
NAND memory: Toshiba of Japan, Hynix of Korea, etc.
Power Management: Qualcomm, USA
Audio chip: Cirrus Logic in America
Wifi module: Murata Co., Ltd.
GSM/ WCDMA/ CDMA/LTE power amplifiers: from Skyworks, Triquint, Avago, etc. All American companies.
LTE module: This is a key component from Qualcomm, USA. It is worth noting that the sub-module supports mobile TD. I wonder if Mobile will sell ip5. If so, it will definitely be a big plus for Apple.
Camera: The sensor 800 is Sony's, and the front camera is Omnivision's.
Lens: 800 is Dali Radio and Television in Taiwan Province Province, and in front is Yujing Optoelectronics in Taiwan Province Province.
Note that sensors and lenses are not the same thing, one is inspection and the other is lens. Personally, I think sensors are more technical.
Gyroscope: stmicroelectronics
There are many other parts, so I won't say them, because I'm a little confused. Most of them are provided by Japanese and American manufacturers, including Texas Instruments and Broadcom.
According to the cost of a single component, the most expensive ones are: screen, A6 chip and memory. Among these three items, only A6 item, because of Samsung's monopoly on dram core, it is difficult for Apple to bypass Samsung. For other key parts, such as screen and memory, Apple has more or less found two companies to jointly produce, ensuring sufficient production capacity and low price, and has the greatest say in the supply chain.