I think most of the gagdet websites just reviewed the Optimus S and assumed the sibbling phones would be the same minus button function swapping. I know my neighbor has a Optimus U (i think it is) and his case doesnt quite fit on my phone. But it fits perfectly on his. Basic measurements are the same but once you get into the 1/16ths theey start to vary and sadly a 1/16th of inch is just enough to make things ****ty.