Reportedly, select tourists will be given Galaxy Note 5 handsets for up to 5 days, in addition to 1 GB of free mobile data. This is part of a program that aims to promote South Korea's top-tier mobile technology (as you probably know, despite being an internationally famous company, Samsung is based in South Korea).
Together with the Korea Tourism Organization, Samsung and SK Telekom are planning to offer free smartphones and mobile data to about 250 visitors per week (as long as they arrive in South Korea via the Seoul-Incheon International Airport). In a year, over 1,200 tourists could enjoy the benefits of owning a Galaxy Note 5 during their visit to South Korea.
More info about how you can get a Samsung Galaxy Note 5 for free as a tourist in South Korea should be made available via the Visit Korea website (check out the third source link below).
sources: Samsung (translated), Yonhap News, Visit Korea