Q: My iPhone 6 plus ringer sounds distorted

Hi is anyone out there who experirneces like me?

I just purchased a new iPhone 6 plus and its ringer / speaker (not the ear piece) sounds distorted / noisy.

iOS version is 8.4 and I tried even upgrading the iOS to 9.0 beta version. But the problem persists after upgrade

Then I rolledback to ver-8.4 but the problem persists in any case.

Its really so annoying & it seems hardware issue only.

Would appreciate if anybody could show me a workaround for this problem.

Thanks.