SAN FRANCISCO (Reuters) - Apple's (>> Apple Inc.) iPhone 6 Plus uses chips from Qualcomm (>> QUALCOMM, Inc.), Skyworks Solutions (>> Skyworks Solutions Inc), Avago Technologies (>> Avago Technologies Ltd) and other companies, according to gadget repair firm iFixit, which pried one of the devices open in Melbourne early on Friday.

Apple said it received a record 4 million first-day pre-orders for the new phones, double the number for the iPhone 5 two years ago, underscoring investors' expectations the new handset will maintain the Silicon Valley company's stellar growth.

The company is releasing a 4.7-inch iPhone 6 and 5.5-inch iPhone 6 Plus. They will support more than 200 telecoms carriers worldwide, with sales launching in Australia on Friday morning and then in the United States and other countries.

Like previous iPhones, the iPhone 6 Plus uses a Qualcomm (>> QUALCOMM, Inc.) 4G LTE modem, according to iFixit.

Dissembling the device in a Mac repair shop after lining up overnight to buy a phone, iFixit technicians also discovered a Murata (>> Murata Manufacturing Co., Ltd.) wifi module, a Broadcom (>> Broadcom Corporation) touchscreen controller, and chips from Skyworks, Avago and TriQuint (>> TriQuint Semiconductor).

News that a supplier has been chosen - or rejected - for one of Apple's products can sometimes cause drastic swings in stock prices. Apple doesn't disclose which companies make the components that go into its smartphones. It also imposes strict rules forbidding its suppliers from discussing Apple-related business with investors and the media.

Shares of GT Advanced Technologies Inc (>> GT Advanced Technologies Inc), a mineral crystal specialist, slumped 13 percent on Sept 9 after some investors were surprised the US company's scratch-resistent sapphire glass was not being used on the new iPhones.

As in other iPhones, Apple has designed its own processor with technology licensed from ARM Holdings (>> ARM Holdings plc) and in this device it is the A8 chip.

The iPhone 6 Plus opened by iFixit also included a NAND flash memory chip, used for storing media like music and photos, made by SK Hynix (>> SK Hynix Inc). Apple in the past has depended on multiple companies to supply its memory chips.

Raymond James analysts expects sales of iPhone 6 and larger iPhone 6 Plus to top 9 million in the first weekend.

As well as Apple's stores, AT&T Inc (>> AT&T Inc.), Sprint Corp (>> Sprint Corp), T-Mobile US Inc (>> T-Mobile Us Inc), Verizon Wireless and some Apple authorized resellers in the United States will start selling the phones on Friday.

(Editing by Miral Fahmy)

By Noel Randewich