Had my iPhone 7 replaced under warranty, didn't use it and has been boxed while I tried out a OnePlus 5, with the intention of selling the iPhone if I liked it. As it happens, I didn't, so I took the iPhone out of the box, took the plastic wrap off, and immediately noticed scratching across the screen, mostly light surface scratches, but scratches nevertheless. Now, the screen on the iPhone should be brand new. In fact, Apple guarantee it. So, while in London (I live in Loughborough), I took the phone into Covent Garden Apple store, and had it replaced.