1, with different functions: overseas calling cards are mainly used for overseas calls, and can make and receive calls, including voice calls and short messages. The flow card provides mobile data services, such as surfing the Internet, using social media and watching videos.

2. Different usage scenarios: Overseas calling cards are suitable for frequent call scenarios, business trips, business trips, etc. The flow card is suitable for scenarios such as using mobile data networks, surfing the Internet and using applications.

3. Different charging methods: overseas calling cards are charged according to call duration or call times, and traffic cards are charged according to data traffic used.