What to Expect From New Samsung Galaxy S4 Smartphone

Purported image of the Samsung Galaxy IV.

Samsung is unveiling its new Galaxy smartphone Thursday, and there has been no shortage of rumors about the device well before the event, including an eye-scrolling function.

Images supposedly of the phone surfaced on a Chinese forum and were posted Monday on the tech blog SammyHub. It looks similar to Samsung's best-selling Galaxy S III and Galaxy Note, with a slightly larger screen.

Samsung did not respond immediately to request for comment about the images. It should be noted that the phone in the pictures could be another prototype Samsung tested.

(Read More: Two Things Apple Must Do to Catch Up With Samsung: Analyst)

It's widely speculated that the new smartphone, which is rumored to be called the Galaxy S4, will feature a slightly larger display than the Galaxy S III, which has a 4.8-inch display screen. The new smartphone is reported to have a 5-inch screen.

While there was speculation that the Galaxy S4 might take a cue from Apple's iPhone and build a device with an aluminum exterior, it is now widely believed that, like its predecessor, the new smartphone will be plastic but with aluminum trim.

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According to a report from SamMobile, the phone will initially come in three storage options—16, 32 or 64 GB—and be available in black or white. It will may also have a 13 megapixel camera, according to SamMobile.

The smartphone may also also have a feature that allows users to scroll content on their phone with their eyes, according to The New York Times.

(Read More: New Samsung Galaxy S4 Will Track Your Eye Movement: Report)

As for the interior, the Galaxy S4 is expected to get an upgraded processor. Samsung will use Qualcomm's Snapdragon 600 processor to replace the ARM-based GPU chip, which was in the Galaxy S III, according to SamMobile. The chip change will power the display and operating system, which is likely to be Android 4.2 Jelly Bean since it is the latest version of Google's OS.

In its usual fashion, Samsung will likely roll out its Android powered device to all carriers at the same time in the U.S. According to Jefferies analyst Peter Misek, Samsung could build as much as 100 million units of the device in its first nine months.