A set of photos posted on Chinese mircoblogging site Weibo may show the iPhone 6 which is under development at manufacturer Foxconn's premises.

They allegedly show a prototype device that is undergoing tests at the production facility.

The photos show a much leaner device.

The first purported photos of Apple's next generation iPhone have surfaced on the Internet, thanks to Australian writer Sonny Dickson and Twitter user @mornray886.

According to Dickson, the photos were shared by someone in China who claimed that the device is the iPhone 6.

One analysis done by Virtualpants estimated the screen size of the iPhone 6 to be 5.25 inches. It seems to have an edge-to-edge display too.

The device in the photos appears to have a width of 2.6-inch while the current iPhone 5S has a width of 2.31-inch. It also retains the biometric fingerprint sensor and comes in gold.

It's hard to tell whether these images are fake or simply development prototypes. Nonetheless, the latest leaks line up with Bloomberg's report that Apple is launching two larger iPhones this year.

A photo of what Chinese site CTech claimed to be a metal casing for the Apple iPhone 6 was posted onto Weibo early January.

Sources from an upstream supply chain claim that Apple is planning to release a larger iPhone (commonly referred as the iPhone 6) in May 2014, which will be powered by a 20nm processor. Here are some of our favourite concepts of the upcoming iPhone:

Eric Vasille of iPhonesoft thinks the iPhone 6 could look like the iPad Air.

He has even figured out what iOS 8 could look like, which is just a little more refined version of iOS 7.

The iPhone 6C - though we're not sure if Apple will continue making a 'C' model of its iPhones following sluggish sales of the iPhone 5C.

Fabrizio Bianchi comes up with an edgeless look for the iPhone 6.

He removes all the buttons because he believes tapping is the way to go.

How about a transparent iPhone?

This iPhone concept features a dynamic design that is probably way too futuristic for the rumoured launch date of May 2014.

This concept design could probably make it for iPhone 10.

This concept design revolves around Apple's patent for a laser keyboard which could project out of a mobile device.

Apart from being capable of transforming itself into a projector, this concept iPhone doesn't look too different from the iPhone 5/5S in terms of its exterior.

And sports a radically redesigned iOS, which we don't think will be introduced that soon when the radically redesigned iOS 7 was just rolled out not long ago.

Another idea of how an iPhone with a laser keyboard could look like.

Unlike the previous design, this concept iPhone looks more dissimilar to the iPhone 5/5S.

Arthur Reis's concept of the iPhone 6 features a new home button. He isn't the only one who has tinkered with the home button. There aren't many things to tweak on the iPhone as the design and layout is quite clean by nature (unless a complete overhaul).

What is unique about Arthur Reis's concept is the area around the home button. The entire space works like a magic trackpad.

"Works like magic - Touch anywhere at the bottom. Boom. You're on the home screen. Just like how a magic trackpad works. Like magic."

The redesigned home button is barely visible, creating a flat and smooth surface that is visually appealing.

Stronger than a stone. What a bold statement to make. And so, the concept iPhone 6 is "everything-proof". How about theft proof?

iPhone 6's 12 MP and f/1.8 aperture camera works on iSight Pro, capturing the best pictures.

Curved Wrap Around AMOLED iPhone 6 from T3. In March 2013, Apple filed a patent for a wraparound-style display.

Gadget website T3 created their iPhone 6 using a 3D rendering machine. What we get is a screen that is nearly 360 degrees, wrapping around the phone. Wait, which is the front and the back?

T3's iPhone 6 has a 1615 X 1800 pixels wraparound display and Facetime HD, with a 2MP Front-facing camera.

Which makes Apple a really late-comer to the NFC scene, although not many businesses have adopted NFC.

What's really interesting is the 'Gesture controlled virtual buttons' in T3's concept video. Since the screen wraps around the phone, there is no need for physical volume control buttons. Just scroll up or down to adjust the volume.

The wraparound screen allows the display of panoramic photos with stunning detail.

This is another neat concept design featuring a wraparound display proposed by Iskander Utebayev.

The touchscreen buttons are located on the left side of the iPhone 6.

It has a battery light indicator which current iPhones do not have.

The home key is gone, and the bezel is nearly gone too.

Martin Hajek created two versions of the iPhone 6: A 4″ and 4.8″.

This is following rumours about the iPhone 6 sporting a 4.8-inch screen.

Current iPhones sport a 4" screen, which is an exception in the market now, where phone manufacturers have been increasing the screen size of their phones.

This means that the fingerprint scanner function will be remove.