Americans traveling to South Korea to attend the 2018 Winter Olympic Games will be able to roam for free if they subscribe to T-Mobile or Verizon Wireless. T-Mobile says its customers can take advantage of free unlimited high-speed data, unlimited calls within South Korea and back to the U.S., as well as free texting while attending the games. The service will be made available automatically to T-Mobile customers visiting South Korea between February 7 and March 20. T-Mobile customers will need to be on a post-paid plan to roam in South Korea at no cost. No other actions are required. Verizon says its customers can roam in South Korea for free during the games, too, but its subscribers will have to jump through some hoops. To start, Verizon customers will have to enroll in the Verizon Up rewards program by January 28 and then sign up for the company's Travel Pass service. Verizon Up provides access to rewards, such as event tickets, though it also opens Verizon customers up to more targeted advertising based on location and browsing habits. Travel Pass normally costs $10 per day when roaming, but Verizon will waive the fee for those who sign up for Verizon Up and register with TravelPass before they leave for South Korea. Verizon is offering customers 500 MB of high-speed data per day while in South Korea. Verizon customers will need to have a world phone in order to roam in Korea.