phone or tablet?

Hi, for some apps we may need to tell if the device running it is a phone or a tablet due to layout changes that we may apply on it. Until now a somehow safe method I used was checking for stage size. If width or height were above 1000 pixels I could tell the app is running on a tablet. However, now we have been presented with high res phones, like the Galaxy Nexus, and this method can no longer be used... Is there a way to know if the device is a tablet or phone?