Samsung's Note series has always had one defining tool, which none of its competitors have even tried to imitate on a smartphone – the S Pen stylus. Aided by a Wacom-made digitizer that rests beneath the phone's screen, the pen offers palm rejection and a whopping 4096 levels of pressure recognition. It feels very natural to use, and offers enhanced features via a mechanical button on the S Pen's side and various software optimizations.