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How to choose primary and secondary numbers for iphone SMS?

Iphone dual card has been around for some time. Now users can use the primary and secondary numbers, which is simple and convenient, but they still need to distinguish. Let's take a look at how to choose the primary and secondary numbers for iphone SMS.

How to choose primary and secondary numbers 1 for iphone SMS? Open the mobile phone information application and click on the top right corner to create a new message.

2. After entering the receiver's number, click the current default SIM card, select the primary number or secondary number in the pop-up dialog box, and then send a short message.

This paper takes iPhone 13 as an example and applies it to ios 15 system.