I dropped my iPhone from less than 2ft this morning on a tile floor and one corner there is a small crack on the corner on the back. I have AppleCare+ which would cost me 99 + tax but I am wondering if I should have it repaired and risk the repair causing problems. I am on the Apple upgrade program so even if I don’t fix it I would still have to play the 99 fee in September when upgrading. Do they fix the back in store?