Many iPhone 7 and iPhone 7 Plus users are complaining that the new devices create a sound similar to a snake hissing.
The sound can usually be heard when a processor-intensive application is working or when the devices are heavily used.
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Apple iPhone users began posting videos on social media of their phones making the noise. It remains unclear how many phones may be affected. Apple has yet to issue a response.
Customers check out the new Apple iPhone 7 at the Apple Store at the Grove in Los Angeles on Friday, Sept. 16, 2016. (AP Photo/Richard Vogel)