EE has today announced plans to rollout its 4G LTE network to another 27 towns in the United Kingdom by June 2013, expanding its 4G coverage to 55% of the U.K. population. The carrier is currently the only network to offer a 4G service in the U.K., but its latest announcements comes as rivals begin making preparations for their own 4G services.

An internal launch calendar from T-Mobile has been leaked online, revealed the launch dates of three Android handsets — including the Samsung Galaxy S III LTE and the Galaxy Exhibit — and the new BlackBerry Z10. Although these release dates are yet to be confirmed, it appears March is going to be a big month for T-Mobile.

EE launched the United Kingdom’s first 4G LTE network back in October 2012, and with it came some pretty expensive price plans; the carrier has certainly been taking advantage of the fact that it has the U.K.’s only 4G network. But that approach is going to be spoiled by rival carrier Three.

Already the cheapest of all the U.K.’s major providers, Three is looking to maintain its position by promising its customers that they won’t pay any extra for 4G connectivity.

The Samsung Galaxy Nexus LTE, the first Nexus device to offer 4G LTE connectivity, has been discontinued by Verizon Wireless just over a year after it was released. The carrier is no longer offering the device online or in-store, and so the only way to bag one now would be to look for a secondhand model.

Samsung first unveiled the Galaxy Grand, a dual-SIM smartphone with mid-range specifications, which is aimed mostly at emerging markets, back in December. Just a month later, the company has unveiled another model for its native South Korea, and it comes with a number of significant improvements such as a quad-core processor and 4G LTE connectivity.