Before you start picturing what this kind of speed would look like on your own Galaxy S5 Prime, the speculation is that speeds like 225Mbps would be available only in Korea from carriers like SK Telecom. That carrier's LTE-Advanced network, which offers max data speeds of 150Mbps, uses 10MHz x 10MHz spectrum. To achieve the faster 225Mbps speed would require the carrier to have a 20MHz bandwidth.