Super bad audio quality from iPhone 6s Plus speaker When I use Skype on speaker on my iPhone 6s Plus with iOS 9.0.1, the sound from the speaker is horrible. I uploaded a sample to SoundCloud.

I tested this on my iPad 4, and on the same OS, no such problem exists.

I had this phone for one day, and seems like this is a hardware problem. What do you think? I had this phone for barely a weekend, so if this is a hardware problem, I will be likely to have a chance to swap with a new phone!
Apple generally give 72 hours for a Dead On Arrival (DOA) or Early Life Failure (ELF) swaps. 

I would take it to an Apple retail store as soon as possible to have them test it.