(Telecompaper) The launch of faster LTE-A 4G services in Spain will take place gradually to avoid disruption of digital TV services and will not be complete until March 2018, according to the agency in charge of monitoring its deployment. The 800 MHz band frequencies previously used by digital terrestrial TV (DTT) were released for 4G use from April, and the new mobile transmissions will need careful monitoring as they are switched on, the llega800 agency said.