Vodafone has confirmed it now has 100,000 customers on its 4G service, which seems pretty decent after such a short time.It also seems reasonable considering the Red 4G plans are only really applicable to customers in the London area and other selected locations right now, so is playing to a very limited audience. Saying that, it's not an overwhelming success. According to one journalist, there are 400,000 4G devices on that network right now. But as we said, one in four in a limited area isn't a bad thing.That could change in the coming weeks though. Liverpool has been confirmed for a 'switch on' from 17 October, while Glasgow will get the service from 24 October. Manchester will go online shortly after that, but no date has yet been given. he 4G service will also be pushing out further across the Greater London area too, up to Harlow in the north, Dorking in the south, Dartford in the east and up to Windsor in the west.It is getting there slowly but surely, but it is likely to be well into 2014 before we see anything like extensive coverage.