Hi all. I've had my new iPhone 7 Plus 256GB Matte Black phone for about 2 days now. I've been handling it like it's a nuclear warhead, gently placing it on soft surfaces and being careful not to get any scratches before my case arrives (today, incidentally). However, today, to my horror, I noticed these super odd "crop circle" type...scratches? or marks? on the back of the phone. They definitely aren't scratches that I made myself. Regardless of the fact that I have been treating it so carefully, there is no way I could make scratches in perfect circles, the same size like that. What do you guys think the issue is? It was sorta hot last night when charging, it almost looks like something from the inside made those marks. I am so frustrated because I just got this phone after waiting so long after my preorder, and I do NOT feel like giving it back up for repair right now.