Apple Inc. said it is working on a fix for its iPhone X smartphones, after reports that their screens are unresponsive when cold, but did not comment on a green line some have reported seeing on the model’s screen.
“We are aware of instances where the iPhone X screen will become temporarily unresponsive to touch after a rapid change to a cold environment. After several seconds the screen will become fully responsive again. This will be addressed in an upcoming software update,” Apple said in a written statement to Caixin.
The response came after many users, including in China, reported the screen malfunction. A Sina Weibo user who goes by the screen name Dongtiangezhu told Caixin that his iPhone X screen once stopped working for two to three seconds when he was in a northern China city where the temperature was between -1 and -2 degrees Celsius.
Some users have also complained about a mysterious green line that runs vertically along one side their iPhone X’s screen, but Apple didn’t respond to Caixin’s request for comment on this matter.
The iPhone X, which was released Nov. 3 and costs 8,388 yuan ($1,263) in China, is Apple’s first handset to feature an organic light-emitting diode (OLED) screen, which allows a greater contrast ratio and responds more quickly than a conventional liquid crystal display (LCD). But OLEDs are less stable than their LCD counterparts.
Apple has said that all iPhones can operate properly between 0 C and 35 C, and should be stored between -20 C and 45 C.
“Low- or high-temperature conditions might cause the device to change its behavior to regulate its temperature. Using an iOS device in frigid conditions outside of its operating range might temporarily shorten battery life and could cause the device to turn off,” according to Apple’s website.
Other smartphone-makers have set similar temperature ranges. For example, Huawei’s latest model — the Mate 10 — can work properly between 0 C and 35 C, and users have reported that their phones shut down if it is too cold.
In 2016, the news portal of internet giant NetEase Inc. compared the durability of six smartphones, including iPhone 6, iPhone 6s, iPhone 5 and models made by Chinese firms Huawei and Xiaomi. It found that iPhone 6 was the first to shut down at 0 C, within 29 minutes, while Huawei’s Mate 8 model consumed the most power at this temperature.
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