How to switch the primary number and secondary number of Apple mobile phone?

Iphone began to support dual card dual standby, which is a great thing for friends with two calling cards. So how to switch the major number and minor number of iPhone 1 1? Bian Xiao is here to provide you with a tutorial on switching between primary and secondary cards of iphone 1 1. Let's look at the unclear friends.

Iphone switches between primary and secondary cards.

Turn on the cellular mobile network in our settings.

Cellular mobile data can be changed from primary card traffic to secondary card traffic.

A checkmark will appear on the selected number, and then you can choose to switch cellular mobile data, which can be automatically switched during the call.

Click the default voice number, you can change the number to make a call, and it has no effect on the docking call.

You can click on the main card to select another card during a call.