South Korea's travel wifi problem! ! ! !

WIFI in Korea does have a wide coverage and a very fast speed. I feel that I can't surf the Internet casually, and some have to enter a password, but some cafes or airports can use it casually. As for walking around the street with my mobile phone, I can surf the Internet at will, but I shouldn't, at least I shouldn't. Some WIFI can be found, and the signal is full, but it just can't get on. Generally, Korean mobile phone cards are either 3G or 4G services, and many G services can be used for one month ... What you see in the subway is also there. I haven't seen anyone looking for WIFI on the street.