Personally I'm experiencing severe issues with the O2 3G network around where I live. The 3G network collapse completely day and night, especially during daytime when the city is crammed with tourists. Still my main issue is NOT just the slow browsing speed on the 3G network, but rather for me it's the case that I can't even make/receive any phone call or SMS most of the time on 3G, not to mention web browsing. Literally, it's completely unusable and I am FORCED to disable 3G while in the city, for the sake of just being able to make and receive phone calls! How ridiculous is that, therefore putting up this poll wondering how the network quality is for other UK 3G iPhone users?