Is the worry-free traffic package reliable? Are there any useful friends who want to buy a set meal to use abroad?

Very reliable. I only used their APP when I went to Korea a few months ago.

Most of the countries and regions you often visit have been covered. Very convenient. You can buy it by opening the worry-free line. In fact, in most cases, when you arrive, you will automatically connect to the services of overseas operators, and you don't even need to do it yourself (the mobile phone should not be too old).

But it's only 3G, not 4G. However, the speed and signal quality of overseas 3G are called the eyes of the mainland.