Hate to speak for Jonathan, but in my case, it seems to happen on my home WI-FI network but that is probably because I turn WI-FI off when I leave the house to conserve the battery. I know the network is configured properly because when I go into settings, to turn WI-FI on, I can, and it works fine. In my case, I have reset the phone and I am using the latest software 1.02.