I purchased this case/holster and it fits the phone perfectly with one (important) exception. There is no hole for the headphone 3mm jack! Regardless of how one positions the phone in the holster, there is no room for a jack so you'll have to cut a slit/hole in the case in order to get the phone jack connected to the phone to slide down into the holster. Having a hole in the end of the case is not enough, the jack has to be connected to the phone, otherwise, when connecting, the music stops/pauses - the same happens when the jack is removed.
Ebay Item HTC Arrive Holster