iPhone 7 and 7 Plus Makes Hissing Sound Under Heavy Load

Some random users found their iPhone 7 makes a hissing sound under heavy load. It is unknown what is the cause since iPhone 7 do not have any fan to cool down its internal component. It is believed the sound is coming from defect manufacturing process and Apple will replace it with a new device. But for those who bought a Jet Black or Black iPhone, 7 might have to wait a bit longer because the model already sold out.

iPhone 7 Hissing Sound:

 

iPhone 7 Plus Hissing Sound:

 

(via 9to5Mac)

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