Many iPhone 6 Plus owners say their devices have developed a pronounced bend in the middle, suggesting a possible structural flaw.

Unlike numerous phones that are supposed to flex as a design feature, the iPhone is not supposed to warp.

The iPhone 6 Could Bend In Your Pocket… !! haha.. love u APPLE pic.twitter.com/MJV2s5kT1a

— Nelson Cardoz (@nelsoncardoz) September 23, 2014

It's thought that the issue is simply because the 6 Plus is so much larger and thinner than previous phones, that the aluminium case simply doesn't have enough strength proportional to its length. Watch the “bend test video” below.

It’s fair to say that pretty much any smartphone will bend if you apply enough pressure - there were similar reports of Sony's Xperia Z1 warping earlier this year - but unfortunately for Apple, the hype, price and prestige of their devices means any fault is going to gain far more traction than those of their counterparts.

Apple has yet to respond to the issue.

Earlier this week the tech giant reported that they had sold a record 10 million units of the iPhone 6 and iPhone 6 Plus. Both smartphones offer larger screens than any previous models as well as an improved processor, larger memory and a better camera.

Adrian Weckler is the technology editor with the Irish Independent. He says the change is permanent.