The majority of DVR's are still not Smart Phone compatible. For the select few that support Smart Phone technology they are generally limited to Droid 2 or iPhone models only. In most cases this type of remote viewing is achieved via the phone browser or a downloaded application. Additionally, you will only be able to view one camera at a time. It is important to note the speed and quality of the image via a remote connection is greatly dependent on the DVR's or Cameras compression type and the speed of the Internet connection on both ends.