Like all Apple launches, speculations on next-generation iPhone are running high. Cyberspace is abuzz with rumours on the expected device’s launch date, likely features, price, versions and more.

Though iPhone 4S smashed the Apple’s sales records with its roaring success, it still left Apple fanboys disappointed who were hoping for a completely redesigned iPhone.

Speculations are hight that the coming iPhone will be a complete redesigned version. Some even suggest that it is the version late Apple founder Steve Jobs really worked on.

So, here’s all that Apple’s sixth-generation phone will pack as per the rumour mills.

Display
The new iPhone is likely to have a sharper and bigger 4.6-inch “retina” display. Several reports claim that the high-definition “retina” display — containing several times as many pixels within the same area — used in the new iPad will make its way in the new iPhone also.

However, Topeka Capital Markets’ analyst Brian White predicted in a note to investors, “In our view, this will be the most significant iPhone upgrade with a four-inch screen and a new, sleek look that we believe will require a Unibody case.” He wrote, “This new, sleek look will be the most important reason that consumers decide to upgrade to the iPhone 5, while we believe the addition of 4G will also attract buyers of the new device.”

Processor
Several reports claim that Apple is testing the dual-core A5X processor found in the latest new iPad. This, however, is contrary to earlier reports that the next-gen iPhone 5 could have a quad-core A6 processor.

The iPhone 5 is also likely to have 1GB of memory which will promise smooth multitasking.

iOS 6
According to web rumour mill, iPhone 5 will ship with iOS 6 update. The new update is expected to be released at the Worldwide Developers Conference in June. Apple had announced iOS 5 software at last year’s event.

Camera
There’s a strong possibility of a 12 megapixel camera making its way in the next iPhone. Considering rivals are adding pixels to their phone’s camera, Apple is expected to upgrade from a 8 megapixel in iPhone 4S to 12 megapixel.

Siri update
It is expected that the new OS will bring updates to Siri, Apple’s voice-controlled personal assistant software which made its debut last year with the launch of iPhone 4S. Going by the rumours, Apple is likley to make improvements in the way Siri analysis connotation and meaning.

According to iOS 6 News Blog, Apple’s improved voice recognition system will be activated by simply shaking the phone and website search, navigation and social media sharing will all be possible through a simple voice command.

NFC
Like in case of iPad, rumour mills are speculating on a possibility of NFC (Near Field Communication) support in the upcoming version of iPhone.

NFC is a technology that allows mobile users to use their handsets as digital wallets. The technology enables users to pay for retail goods or services such as transit rides by waving their handsets across a reader.

4G LTE
Like the new iPad, the next-gen iPhone is likley to get high-speed network 4G LTE. LTE promises higher download and upload speeds compared to 3G technologies.

The new iPad’s high-end model is capable of operating on a high-speed 4G LTE network, at speeds roughly 10 times faster than the current 3G technology.

Bigger battery
Going by the rumours, one can expect a bigger battery in next iPhone. This is likely to make up for high-definition screen as well as for the inclusion of 4G/LTE radios.