How to switch numbers when sending text messages on dual-card mobile phones?

1. First, open the settings of the mobile phone, find the dual-card settings and click Open. In the opened dual-card settings options, find the default dial card and click Open.

2. Secondly, check the "Default Dialing Card" option as "Don't set", then open the "Information" App, click the blue in the upper right corner and select a new message.

3. Finally, in the "New Information" page that pops up, enter the "Recipient" to be sent, and a "Major Number/Minor Number" button will appear below. Click this button, and select the card to be switched in the pop-up menu below to switch the number to send SMS.