Back in October when EE launched their 4G network I wrote a post on their spectrum usage at the time (here). As recently announced by EE themselves they have now manage to re-farm another 10MHz block from their 1800MHz spectrum and thus offer LTE at the maximum 3GPP rel8 bandwidth of 20MHz.
As can be seen from the SIB19 extract below their new 20MHz EARFCN is 1667. This effectively extends the original 1617 EARFCN by 10MHz to the right of the 1800MHz spectrum allocation.
By defining both carriers in SIB19 they don't need to constantly update their 3G network as the 20MHz roll-out continues, as UEs will scan both centre frequencies and pick the one available to reselect to.
From a device perspective all LTE capable UEs must support 20MHz bandwidth so they all take advantage of the additional capacity.
Next step for EE is 3GPP rel10 carrier aggregation, which they announced they are looking into and will take advantage of their additional spectrum assets in the 800MHz and 2600MHz bands.
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