My phone - T-Mobile MDA (also known by many other names). It is a phone/PDA with WI-FI.The reason for the purchase was that the original case would not allow the phone to be read or used without removing the phone from the case.This case has a clear plastic cover, which protects the screen and allows it to be read. The cutouts allow access to most of the buttons.Along the top of the face of the phone, there are buttons for the Internet and messaging. These are covered by the case.The case fits snugly and is made from thick aluminum. Herein lies the problem. The aluminum interferes with signals. With the case open, the WI-FI dropped off a third and with the case closed around two-thirds. The phone signal also dropped off. While this was not a rigorous test, the point is that one would lose signal strength due to the metallic case. For a PDA without WI-FI, this is fine. For a phone and WI-FI this could make the device useless. This was my situation.If you can afford the signal loss, don't mind the rather large cutouts and the covering of the Internet and Messaging buttons, then this is an excellent case.