With phone specifications often reaching a terminal velocity before the next new technology or trend, giving your hardware a differentiator can be hard. Sharps new AQUOS Serie mini SHL24, however, is having a stab at a couple. Firstly, the TV-maker is leveraging its IGZO screen tech, and spicing it up by cramming a full (1080p) HD display into the 4.5-inch panel — thats almost 490 PPI.