Three have already declared their average 4G speed will be around 18Mb. It appears they are not geared by speed at all. Indoor coverage is what they want to improve. Understandable as 2100mhz 3G has always been an issue for them in regards to indoor coverage.
Currently it seems they are activating areas where the capacity on 3G is low, plonking the odd 1800mhz mast here and there and then declaring that town / city is enabled.
I must say I have been very disappointed with their 4G roll out so far. I thought it was going to be as aggressive as EE's has been, hence why I stayed with 3 and didn't jump over to EE. Even in areas where the coverage is supposed to be very good on the coverage map, the reality is different.
It will be a flat out battle between EE and Vodafone in regards to the best 4G network. From what I have seen of Vodafone 4G, the speeds are very impressive and the coverage in the areas enabled is also excellent, especially indoors. Vodafone are also using 2600Mhz along with 800Mhz in cities which is pushing the headline speeds up.
BT BroadbandInfinity 2