Many friends go abroad for travel, as they do not know how to go online. They worry about paying expensive Internet fees when using the Internet in the hotel. Therefore, traveling abroad is like cutting off contact with relatives and friends at home. Some friends are even isolated from the world because they cannot browse some domestic information due to no Internet access. In fact, when traveling abroad, if you know some tricks, you can get the chance to surf the Internet for free, which is more convenient than surfing the Internet when traveling domestically.