Three is making some big moves. First of all there's the plan to acquire O2, which will create a huge mega-network and entirely shift how the UK's mobile networks are structured. But today the news is about 800MHz, a part of the spectrum that Three bought in 2013.

Because 800 is a low frequency - others are around the 1900 and up range - it will cover people who previously didn't have service. Low frequency signals have fewer problems passing through windows and walls too, so if your signal on 4G is a bit weak inside, Three might get a boost in your house.

The other part of this is VoLTE or Voice over LTE which is a change to the way voice is conveyed. In the past a normal phone call would not use 4G - which is a data only service - and would place the call on the older 3G system. The move to VoLTE means that calls will connect a great deal faster - no waiting for the setup, press the call button and you'll hear ringing nearly instantly.

The other advantage of VoLTE won't benefit users directly, but it will allow service providers to send more calls over their network. This could in theory reduce the cost of phone calls and the equipment needed, which may have a knock-on effect for normal users.