Does anyone who has an iPhone 4 under an O2 contract experience a range of 1-3 bars for the signal on a consistent basis? I just got my iPhone and have been left pretty disappointed - I know having a strong/bad signal doesn't directly affect the quality of a call under 3G, but when accessing the internet via the network, a low number of bars being displayed is having a detrimental effect on the bandwidth cap, hence limiting my access to faster data speeds. I have heard this issue being reported on the Apple forums as well, so it looks like it isn't just directly affecting O2 customers, but other mobile operators as well. Could the last update on the signal bar display be the source of all this? I fear that this more 'accurate' determination is actually working against me. O2 is supposed to have the best coverage in my area for 3G, but even when I went to London, I seldom got a full 5 bar signal. I've spoken to a representative and they said it's very normal for fluctuations to happen, but I severely doubt this.