(Reuters) - Apple Inc's fifth-generation iPhone uses a wireless chipset from Qualcomm Inc, according to repair and parts specialist iFixit, which cracked the device open on Thursday.

The new iPhone also features the Apple A5 chip with 1 GHz dual-core processor, according to iFixit, known in the technology industry for stripping down and revealing the innards of Apple devices.

The Qualcomm chipset is an upgrade from the one used in the previous version of the phone, iFixit said.

Apple is famous for designing sealed-up devices intended to discourage fans from poking around in them.

The iPhone 4S will hit store shelves around the globe on Friday after a 15-month hiatus, and is expected to draw the usual throngs eager to grab a piece of the final gadget unveiled during Steve Jobs' lifetime.

The fifth iteration of the iconic smartphone comes with a faster processor and a better and more light-sensitive camera, but otherwise is a spitting image of its predecessor. Tech experts say the real gems lie beneath the familiar sleek casing, especially in its "Siri" voice-activated digital assistant.

For a demonstration of the teardown, click http://www.ifixit.com/Teardown/iPhone-4S-Teardown/6610/1

(Reporting by Edwin Chan in Los Angeles and Poornima Gupta in San Francisco; Editing by Lisa Von Ahn)