I also would not recommend going below 192, however, it is a personal preference as too how low you want to go. I would not recommend going higher than the default 240 as everything appears too large and stuff like text will start on overlap. However, if you choose a higher DPI (say 280) it will give the appearance of a lower resolution screen and everything on your phone will look bigger. If you lower the DPI (say to 192) it will give the appearance of a higher resolution screen and everything on your phone will look smaller. Basically, the default DPI (LCD Density) for our devices is 240 DPI.
