Credit: © 2012 Apple Inc Caption: Apple iPhone 5
Speculation about a new iPhone ramps up every year around this time, as predictable as back-to-school shopping and that first whiff of fall in the air.

But this year has seen something a little different: A tweet from a Fox News anchor about a new component for the phone is fueling excitement about its potential speed. Clayton Morris referenced a new 64-bit A7 processor as a possibility for the new device.

"Sources are telling me the new iPhone's A7 chip is running at about 31% faster than A6," he wrote. "I'm hearing it's very fast."

That's led to speculation that the next iPhone, thought to be called the iPhone 5S, could run 31% faster than the previous model, the iPhone 5 (pictured). Apple (AAPL) is expected to unveil its new phones on Sept. 10.

A website focused on Apple, 9to5 Mac, also weighs in, with writer Mark Gurman saying he has heard that Apple is testing 64-bit processors in some of its internal prototypes. But there's a huge leap from testing to implementation, and we don't know for sure if the move to 64-bit processing will come this year.

Here are some other iPhone rumors that tech blogs have been puzzling out recently:

Color. The new device might come in four colors: black, white, grey and a champagne tint.

IPhone 'C'. Apple may be developing a low-end version of its iPhone in addition to the top-of-the-line iPhone 5S. The low-cost, plastic-backed phone, called iPhone "C" by some, may be designed to boost sales in China and other emerging markets.

Fingerprint sensor. Apple acquired a fingerprint sensor company last year called AuthenTec, naturally leading to speculation that the next iPhone will have a scanner for heightened security.

Camera. The new phone may have a larger aperture, which allows for more light and better image quality, and a better flash.

Storage. The phone might have a 128GB flash storage chip, which seems like a lot for a phone. But for some power users, the iPhone has become a de facto computer, so for them that level of storage makes sense.

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