I had almost the same problem. Started with a few hairline cracks. Over a few weeks they became bigger, longer, and darke. then started to bubble at edges, then they started to work way towards center. I dreaded finding out me repair options and anticipated a fight to get it fixed. Or doing without my phone for awhile. Especially after reading so many comments and seeing photos of exact same thing. But got bad enough I had to do something. Instead of calling, I opted to take it into the Xfinity store I bought it from. He looked at it for a minute, then stuck his fingernail up along edge as if to try and peel off what I thought was a baked on screen protector. I interrupted and told him not to do that, that it was fused. While I was talking, he peeled off a thin piece of plastic. It came on the phone and had never been removed. You CANNOT tell it's there. Phone was good as new. He said it happens all the time, they started putting it on awhile ago. He said it happens people think it is damaged all of the time. Had it on his fold and his wife's flip. I had shown it to my son-in-law and some other techs, they all said it's the phone and they'd never buy one. Turns out it was very thin plastic. Anyway, not saying it isn't the phone, but you may want to check. I was elated, and tech acquaintances we're quite surprised!
