Hissing Sound On New iPhone 7, What Is Going On With Flagship Devices This Days?

Some iPhone 7 users are reporting that their phones are creating a 'hissing sound' at the back when it is performing some heavy duties like synching. Remember iPhone 7 was just
made available few days ago and it's the latest flagship device from Apple which costs a fortune to get.

This is happening the same period when Samsung Galaxy Note 7 users are also reporting frequent overheating and exploding of their new device. What is really going on?

One of the first reports of this unusual noise was from Twitter user Stephen Hackett , he said "the sound was loud enough to be heard with the phone sitting on the desk while the phone was
syncing with iCloud."

Apart from Hacket, other iPhone 7 users have also confirmed it although not all. Just like the Galaxy Note 7, not all the devices are affected by this.

WHAT ACTUALLY IS THE CAUSE OF THIS 'HISSING' NOISE?

According to GSM arena "The source of the sound is likely to be coil whine of some sort, where under stress some components can vibrate and produce a resonance that is audible. Most
processors, especially GPUs, produce a faint amount of coil whine but it's only an issue if it gets too loud. This was normally not an issue on smartphones until now as the processors just weren't that powerful but with the latest smartphones reaching laptop level performance, particularly the iPhone 7 that beats some of Apple's own notebooks in CPU performance, coil whine could be an issue."

WHAT IS APPLE DOING ABOUT THIS?

Affected users are directed to go and have their 'faulty' iPhone 7 replaced as it might not be easily fixed. iPhone may also have a redesigned iPhone 7 soon.