We at WiFi Korea have one mission : To provide affordable data roaming solutions to those that need it. We use daily flat rates that do not surprise the user when they get home. Compared to your provider at home, you will be able to see that we have lower price than they do.
You will be able to connect up to 5 different devices with just 1 portable wifi! This is the biggest difference between roaming with your provider and sim cards. Just carry 1 portable wifi with you and you will be able to connect easily with your friends and family!