In today's episode of Tech Teardown, Erin Kennedy discusses the latest developments in the tech sector with Evan Niu, CFA, our tech and telecom bureau chief.

Twitter updates its S-1 filing to include its latest performance in the third quarter. The company unsurprisingly puts up major growth in its ad business.

Even as Apple's iTunes Radio has just launched, Pandora isn't scared too much. Pandora has seen this before, and still feels confident that it has the best service out there that no money can buy.

There are also reports that Apple is cutting orders from suppliers for its iPhone 5c, which could hint at weak demand for the mid-range model. The report itself should be questioned, though, as we've heard similar supply chain rumors in the past. In other Apple news, Bloomberg Businessweek argues that iPad revenue matters more to investors, but its argument is full of holes. With Apple's event next week, is the Mac maker hinting that it might have a keyboard cover in store?

Amazon.com almost certainly has a smartphone in development, and it might be partnering with HTC for the device.

Erin Kennedy has no position in any stocks mentioned. Evan Niu, CFA, owns shares of LinkedIn. The Motley Fool recommends and owns shares of Amazon.com, Facebook, Google, and LinkedIn. It recommends Pandora Media and owns shares of Microsoft. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.