iPhone 5

 Apple's iPhone 5 uses chips from Qualcomm, Avago and Skyworks Solutions, according to repair firm iFixit, which pried one open.

The latest iPhone, which first went on sale in Australia on Friday morning, has a larger, 4-inch screen and is slimmer and far lighter than previous models.

Apple booked over two million online pre-orders for the device in the first 24 hours, underpinning investors' expectations the new device will maintain the Cupertino, California company's meteoric growth.

Other companies supplying parts for the new phone include memory chipmaker Hynix and radio-frequency chipmaker Triquint, according to iFixit, which stripped down one of the new devices in Melbourne.

News that a supplier has been chosen -- or rejected -- for one of Apple's products can cause drastic swings in stock prices. But Apple doesn't disclose which companies make the components that go into its smartphones.

iFixit co-founder Luke Soules spent the night lined up at a local store to buy one of the first iPhone 5s.

Fueled by Red Bull energy drinks to keep himself going, Soules rushed the phone to a nearby Mac repair store fitted out with tools, lights and a camera to begin dissecting the iPhone, a process that can take hours.

To see iFixit's teardown, click http://www.ifixit.com/Teardown/iPhone-5-Teardown/10525/1

SILENT GRINS

Chip executives who are often happy to boast to reporters about what smartphones their components have been chosen for turn silent at the mention of Apple - for fear or losing current business or missing future opportunities with the world's most prestigious consumer electronics device maker.

Teardowns give investors a vital glimpse of which suppliers have been chosen for new Apple devices.

The iPhone 5 supports faster 4G networks thanks to a chip supplied by Qualcomm. It also comes with a number of software updates, including Apple's new in-house maps feature.

The latest iPhone includes a new A6 processor that Apple says runs twice as fast as the previous generation. Apple depends on Samsung Electronics to manufacture mobile processors on its behalf, a relationship strained by the two companies' bitter legal dispute over patents.

The iPhone 5 packs three microphones, an 8 megapixel camera that can take panoramic views, and improved battery endurance supporting eight hours of 4G Web browsing, the company says.

Earlier this month, shares of Audience Inc plummeted 63 percent after the company said Apple would no longer use its noise filtering technology in the iPhone 5.