The mystery just intensifies as the hour draws closer for what Samsung terms to be 'The Next Big Thing' or the release of Samsung's most-awaited Galaxy S4 smartphone. Even as March 14 being the big day is just hours to go, the rumor mill shows no sign of shutting down and what we have heard lately is that the device will feature a Li-Ion 2600 mAh battery, probably a 3D camera and many more.

In one of the most interesting development about the upcoming device, it has been discovered that Samsung has field for a pair of patents regarding 3D video/image capturing and a new Panorama Camera System.

According to PatentBolt, the company has mainly filed for a patent of its Trademark Logo for a 3D Camera and a patent that covers a new panoramic camera lens. The new Panorama Camera system is expected to bring in some major image quality and special lens specific features to the device.

The patents technically covers the following "Application software for smart phones; application software for tablet computers; digital cameras; USB flash drives; mobile telephones; portable media players; portable computers; rechargeable batteries; smart phones; tablet computers; wireless headsets; lenses for cameras," the report states.

Although the patents in question can be for the next generation Galaxy Camera, tablet or a high-end standalone camera or for any of the products in the pipeline, there is a high chance the feature would arrive on Galaxy S4. "The number '4' in Samsung Galaxy S4 teaser poster is in 3D which could mean that the Galaxy S4 could actually use these technologies," Sam Mobile speculated.

While the 3D camera remains to be a fresh rumor, there is another report that confirms an earlier speculation. Galaxy S4 was speculated to use a Li-Ion 2600 mAh battery nearly three months back and now a leaked YouTube video confirms it, Sam Mobile reports.

Meanwhile, a Chinese forum has published a number of images of GT-I9502 which it claims to be the dual-SIM version of the Galaxy S IV for China Unicom. However, as SammyHub notes, the rumor should be taken with a pinch of salt as it could be just another prototype Samsung may have been testing. However, the hardware details shown on Antutu benchmark appear to be more or less the same rumored for Galaxy S4. As per the benchmark app, the device will notably run Android 4.2.1 and feature a 1080p full HD display with 1.8GHz processor, 2GB RAM and 13MP camera.

In addition to the numerous speculations, there are a couple of official updates about the handset. Samsung USA has tweeted the first detail of the new Galaxy S4. Before you get too excited, the South-Korean tech giant has remained true to the concept of what a teaser should be as it does not reveal much, but just the top of the phone. The device apparently has rounded corners which further solidify the speculations that Galaxy S4 will share an extremely similar shape and design to its predecessor.

Apart from the teaser image, Samsung has also released its second teaser trailer for Mobile Unpacked event showing the Samsung Galaxy S4 'secret messenger' kid Jeremy taking a good couple of peeks at the Galaxy S4 who describes the device to be 'beautiful,' 'unreal,' and 'totally amazing.'

As Sam Mobile lists them out, the Galaxy S4 is rumoured to feature an Exynos 5 (5410) Octa CPU, PowerVR SGX 544MP3 GPU, 4.99" Full HD AMOLED Display, 2GB of RAM, 13 Megapixel Rear facing Camera capable of shooting 1080p Full HD Videos at 30FPS, 2 Megapixel front facing camera capable of shooting 1080p HD Videos and run Android 4.2 Jelly Bean out of the box. The device is expected to come with an eye-tracking technology and may soon incorporate wireless charging ability.

Putting all these together, it appears that Samsung will truly surprise the tech world with its next-generation flagship smartphone when it unveils the device at the Mobile Unpacked event at Radio City Music Hall in New York.

Check out the Samsung Unpacked 2013 Teaser Part 2: