What's the difference between a telecom master card and a telecom slave card?

The difference between the main card and the auxiliary card is mainly reflected in the following aspects: the number is different. The main card has an independent mobile phone number, and the secondary card can have a binding number or an independent number. 123 has different functions. The main card has complete communication functions, including making phone calls, sending short messages and surfing the Internet. The secondary card usually has only some functions, such as making phone calls and sending text messages, and usually shares the traffic of the primary card when surfing the Internet. 23 packs are different. The primary card is usually bound to the user's package, and the secondary card can choose to share the package with the primary card or purchase the package separately. Three different uses. The secondary card can be used for sharing communication in families or enterprises, and the same number can be used on multiple mobile phones at the same time. It can also be used for busy functions, such as testing and standby communication.