The calling card is someone else's secondary card. What's the role? Call the secondary card. Will the main card know? Will the primary card receive a short message to the secondary card? such

The secondary card of mobile phone card (SIM card), also called daughter card, is mainly used to enjoy a charging package with multiple numbers.

1. Data secondary card business is to handle a secondary card for your primary card, which can be put into wireless communication terminals (such as wireless network cards, tablet computers and mobile phones) for online use, and the generated traffic or telephone charges are uniformly recorded in the primary card package.

Second, the main application cases

1, the main card packet flow, distributed to all tablets, mobile phones, etc.

2. Many family members have multiple mobile phone numbers and use a charging bag. Most of these packages also include free broadband charges.

3. Some enterprises and institutions issue job numbers to employees.