Two days ago, the Internet erupted with photos of bent iPhone 6s, and a very-viral video of a guy creasing an iPhone 6 Plus with his bare hands. It seemed like a serious concern, yet everything about the uproar was highly unscientific. We don’t like unscientific, so we promised then that we would use our lab equipment to find out just how delicate the iPhone 6 and 6 Plus really are. We also promised to run the same tests on comparable smart phones. We’ve done that now, and our tests show that both iPhones seem tougher than the Internet fracas implies.
Our test
To stress test these phones, we used what’s called a “three-point flexural test,” in which the phone is supported at two points on either end, then force is applied at a third point on the top—you can see the testing for yourself in our video. We applied and measured the force using a high-precision Instron compression test machine. Along with the iPhone 6 and 6 Plus, we tested the LG G3, Samsung Galaxy Note 3, and HTC One (M8), and for those wondering about their old iPhones, we tested the iPhone 5 as well. We used one sample of each phone.
Yesterday, while we were testing and the "#bendgate" controversy was still swirling, Apple invited some journalists into its labs to show how the company stress tests iPhones. According to published reports, it seems that one of the tests Apple uses is the same three-point flexural test on a similar Instron machine.
The reports stated that Apple applies 25 kilograms (slightly more than 55 pounds) of force to an iPhone 6 Plus to test flex. What does 55 pounds mean in context? Using our Instron, we found that it's approximately the force required to break three pencils.
Consumer Reports' tests pushed the iPhone 6 and 6 Plus much further than 55 pounds. We started light, applying 10 pounds of force for 30 seconds, then releasing the force. Then we increased the force in 10-pound increments, noted when the phones first started to deform (that's what our engineers call it) and stopped the test for each phone when we saw the screen come loose from the case.
The results
To read the rest of the article and see video of the test, click here.