Lately I've been having TERRIBLE download speeds on my iphone 4. I ran a speed test yesterday and today and I'm averaging between 13-17 kb/s. Is that slow? I get almost three times that at home on Wi-Fi, but I can't catch any Wi-Fi at work so I rely on my 3G. Its rediculous, I can barely download anything, even short 2 minute youtube videos won't load. Anyone else experiencing this?