My lady friend up for an upgrade next month and she adores my iPhone 4. When she plays with it though, she can't use her nails (That's what she said). She's afraid of scratching my phone and what soon shall be her phone. She uses the side of her finger or the lower part of it and it looks awkward. What's the solution for this? Does the iPhone work with nails? If so, does it scratch of the screen faster? Thanks for your responses.