A month or two ago I bought an iPhone 5s and stuck in a nano card to which my Vodafone number had been transferred. We are in a 4g area (and don't bloody Vodafone plug it) but here at work in High St Kensington, I have stuck with a 3g card (4g costs extra according to Vodafone, and really I don't see the point) am only getting at best E and all-too-often GPRS. When I raised it with the Vodafone shop just up the road, I was told that 'all phones are different in the signal they get', but I suspect that is bullshit. An iPhone not getting a good signal? What are other people's thoughts?