I tested video calling using a pre-release, tablet-optimized version of Qik, the software being preinstalled for this purpose on the Tab. Results were mixed. It will work over either cellular or Wi-Fi connections, but the version I tried wasn’t tuned for cellular, so we used Wi-Fi. In my conversation with a Qik executive, the call at first failed to go through. When it did go through, it worked fine for awhile, and then failed when I tried a feature designed to hide my image. Later, the audio dropped altogether.