Images of what could be components for the iPhone 4S have been posted online.

MacPost has published images of the components, including the LCD, display panel and home button.

MacPost seems convinced that the parts are for a low-cost iPhone 4S and not the iPhone 5 in the light of reports that the iPhone 5 will have a metal back, not glass like the iPhone 4.

However, it's worth pointing out that there's no guarantee that Apple will launch a revised iPhone 4 or iPhone 4S alongside the iPhone 5 - in fact, the next-generation iPhone could be the iPhone 4S, with no iPhone 5 launched.

iPhone 5 battery leak

The LCD is labelled with 'N94 EVT1', according to MacPost, and also bears the date 3 March 2011. The display panel and home button appear to be exactly the same as those on the iPhone 4, which casts doubt on earlier theories that the home button would be elongated and support left- and right-swiping gestures.

It was reported that the home button would be oval rather than round when images of what is claimed to be an iPhone 5 production line emerged earlier this month.  

The latest from the iPhone 5 rumour mill

It is possible, of course, that there could be an iPhone 4S with a round home button and an iPhone 5 with an elongated home button.