SK Telekom to equip Seoul Metro Line 5 extension with LTE-R, tenders in 2018 March 28, 2018 | Asia Pacific News SK Telecom has secured a contract from Seoul Metropolitan Government to supply Long Term Evolution-R (LTE-R) telecommunications system for the Seoul Metro Line 5 extension by 2020. The extension ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password