For about the past three weeks, every time I check email, download something, or get on the internet, the '3G' symbol at the top of the phone almost immediately disappears and the connectivity slows to a crawl. It doesn't matter if I'm at home or work or wherever. I downloaded the latest update via computer last week and that had no effect at all. What could be the problem? Like I said, this has just happened over the last weeks. Thanks!