So im one of those unfortunate users with the iPhone 7 Matte Black flaking/chipping at the bottom corner on the microphone grill. Tried setting up appointment with the Apple store but im all out of luck for the next week or so. I went to the store anyways and was told to visit one of their 3rd party certified techs. So i went to the 3rd party tech and was told id need to give the phone in for inspection for atleast 4 days. And since i didnt have a spare phone and needed one for work, i did what some users here recommended, i went and bought another iphone 7. Now my question is, when i go in to return the device for refund, how long is the refund process? And provided the device remains in pristine condition, is it a guarantee that i get a refund? Im just a bit worried and needed some clarification based on other users experience. Thank you.