What does it mean to set silent calls and text messages on Huawei's sim card?

The first is to set up a primary card or a secondary card. For example, if you set Like2 as the main card, Card 2 can use 4G/3G network, and Card 1 can only use 2G network. The second is which card you set to use to transmit mobile data. You set it to Card 2, and the traffic consumed is the traffic of Card 2. By default, you need to download the third card for calling and sending short messages from third-party software, and you don't need to select card 1 or card 2, which is generally not required. I hope I can help you and wish you a happy life.