Which is better, the multi-card or the supplementary card?

1, and multiple numbers is a service that can combine multiple mobile phone numbers on the same SIM card, while the secondary card adds a card on the basis of the original mobile phone number, but the use of the secondary card requires the authorization of the main card.

2. Multiple numbers can bind multiple mobile phone numbers and accounts at the same time, which is convenient for users to manage multiple numbers, calls, short messages, traffic, etc. On the same phone. The secondary card can * * * enjoy the call, SMS and traffic of the main card, but the secondary card cannot be used and handled independently.