Good news for O2 customers – your 3G network might just have got faster. Depending on your location that is.O2 has confirmed that it has switched on a new superfast 3G network in Bradford, Bristol, Glasgow, Nottingham, Edinburgh, Newcastle, Leicester, Sheffield and Liverpool today, having gained permission to reuse the 900MHz spectrum for 3G services from Ofcom in January. This follows 'switch ons' in London, Leeds, Birmingham and Manchester in March. Which is great for city-dwelling O2 customers, but not so great for the rest of us.That conversion means a 50% increase in capacity to O2’s existing 3G network. According to O2 and its tests, customers on 3G900 compatible devices (iPhone 4 and iPad 2 for example) are now receiving data 30% faster than before the new spectrum was allocated for 3G use. Nigel Purdy, CTO for O2 in the UK said: 'This 3G900 switch-on is the latest in a series of network enhancements for O2, and is a first for the UK and Telefónica. We’ve acted quickly to bring the benefits of 3G over 900MHz spectrum to our customers and were thrilled with the results. Quite simply, on O2’s network, more customers can use more data, and experience it quicker.'Indeed they can. Just as long as they live on one of the UK's bigger cities. Here's hoping it is expanded beyond that before too long.