Stephen Hackett of 512 Pixels describes the issue...
As my iPhone 7 Plus was restoring from iCloud, I thought I noticed some sound. After picking the device up from my desk, it was clear the sounds are coming from back of the phone, possibly from the CPU. It seems to get worse if the iPhone is under load. It’s loud enough to be heard even if the iPhone is just sitting on the desk.
Hackett has posted a video to YouTube demonstrating the sound:
Notably, he is not alone. Darrell Etherington tweets, "brand new, just-unboxed doing the same thing right now. did not restore, set up as new (still DL-ing email etc)"
Apple is replacing Hackett's iPhone after a call to AppleCare. Let us know in the comments if your device is making similar sounds. If yes, what was Apple's solution?
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Read More [via Engadget]