LTE is massive at Mobile World Congress this year, even more so than last year. Telefonica (who happen to also own O2 UK) have provided access to a 4G network so that manufacturers can show off their new devices as best as possible.
One of these is the new LG LTE phone pictured below with a large HD screen and access to both HSPA+ and LTE networks depending on which your country provides. This is shipping to Europe in Q3 where we wont have LTE access but will have HSPA+ on most networks.
And to see how good LTE really is check out the last image which was snapped in a conference FULL of phone using the network