What should I do if my iPhone always defaults to the secondary number when making calls? 'Understand in seconds: Attached: How to switch the primary and secondary SIM cards on iPhone XS Max'

php editor Baicao brings you a solution to the problem of the default secondary number for iPhone calls. Many users have encountered this problem when using iPhone, but don't know how to solve it. In this article, we will share a simple method to help you quickly switch between primary and secondary cards and solve this problem. If you are an iPhone XS Max user, you can solve this problem through the following methods.

The mainland version of iPhone

Method/Steps

First introduce the main card and secondary card:

The card slot of iPhone XS Max is different from the previous iPhone series products. It allows inserting a card on the back. card, the card on the back defaults to the secondary card, and the card on the front defaults to the primary card.

Now let’s introduce the method of switching primary and secondary cards:

Open settings and click “Cellular Mobile Network”;

Click on the cellular "Mobile Data" to change from using the primary card traffic to using the secondary card traffic, and vice versa;

A small √ will appear after the selected number, as shown in the picture; in addition, you can also check "Switch cellular data", During a call, automatically switch to using the data traffic of another card;

Click "Default Voice Number" to change it Using another card to make calls by default has no effect on receiving calls;

If you need to use a non-default card when dialing a certain number , you can click "Main Card" at the top of the dialing page, as shown in the picture, select another card in the pop-up interface, and then dial again.

This operation will not change the default call number.

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