Anyone experiencing a problem with locating the 3G network on the iPhone 4? Like for example, there's no problem with locating 3G when there is reception, but the problem arises when you go to a place that has no reception whatsoever (i.e. basement), and then go back to a place where there is reception (i.e. on the streets), where my iPhone 4 can't locate the 3G network again. Instead, it gets stuck in limbo and only upon restarting the phone can it detect 3G again. It's incredibly annoying - I'm not sure whether this is a problem with the network or the iPhone itself. But judging from the fact that ever since the 4.0.1 update re-directs your reception to a radio mast with the least traffic, I think the iPhone gets confused when going from a place where there is absolutely no reception whatsoever to trying to find a suitable signal back in the open world.