Apple's next-generation iPhone sports chips from Samsung Electronics, Micron Technology and STMicroelectronics, according to a disassembly analysis by technology firm iFixit.
The iPhone 4 goes on sale tomorrow in five of the world's biggest economies.
Apple moved 600,000 of the slimmer and better-equipped $199 iPhone 4 last week in its first day of pre-sales, a deluge of interest that jammed ordering systems and squeezed carrier partner AT&T's inventory.
But iFixit, one of the better-known among so-called teardown firms hired by clients to provide data and competitive intelligence, said it obtained one of the phones from a Silicon Valley employee who got it in the mail two days early, amid multiple web reports of similar shipments ahead of time.
Samsung supplied flash memory, according to the subsequent teardown. The Micron chip was likely memory, while STMicro - Europe's top semiconductor maker - provided accelerometer and gyroscope chips used for orienting the phone, iFixit said.
Other suppliers included Apple mainstay Cirrus Logic and cellphone chip specialist Skyworks Solutions. Numonyx supplied chips to earlier versions, but was bought by Micron for $1.27 billion this year.
iFixit's Kyle Wiens remarked on how no space within the iPhone had been wasted. "This is so compact," he said. "In terms of internal design, they scrapped this completely and started over."
Early demand for the iPhone 4 - and the larger iPad launched in April - has blown away expectations. Apple, which overtook Microsoft Corp to become the world's most valuable technology corporation, yesterday surprised Wall Street by disclosing it had moved 3 million iPad tablet computers in 80 days. Its shares rose.
But the iPhone is Apple's main growth driver and is expected to soon become its biggest source of revenue. The fourth generation begins selling in the US, Japan, France, Germany and Britain this week but will be in 88 countries by September - the company's fastest global product roll-out.
Early reviews for the smartphone, which sports a higher-resolution screen, about 40 per cent more battery life, video chat via Wi-Fi, a gyroscope sensor for improved gaming and now some 225,000 downloadable applications, were good.
Barclays Capital estimated yesterday that Apple will move 8.1 million iPhones in the fiscal third quarter ending June 26th, surging to 12.1 million in the fiscal fourth quarter as the iPhone 4 production chain accelerates to meet demand.
JP Morgan estimated that 10 million iPhones will ship every quarter as the iPhone 4 takes hold, from around 8 million in the current quarter.
More than 50 million iPhones have been sold since the device debuted in 2007. Wall Street expects the company to sell 8 million to 9 million units in the current quarter, which ends June 26th, and as many as 10 million next quarter.
Apple doesn't disclose who makes the components that go into its smartphones, and suppliers - including Toshiba, Infineon and Broadcom - in previous versions, kept still for fear of angering the company.
Reuters