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How can a dual-card mobile phone distinguish the information received by 1 card or 2 cards?

Information received by dual-card mobile phone 1 card or 2 cards:

1. Take MIUI system as an example, open the SMS application icon in MIUI system and enter the SMS application interface;

2. Next, on the SMS application page, click the currently received information;

You can see that the received SMS will display the number of SIM card in the upper left corner of the message. If 1 is displayed, the SMS of SIM card 1 has been received;

4. Finally, if the SMS is sent by a mobile phone, the corresponding SIM card number will be displayed, and the word "Sent" will be displayed at the same time, indicating that the SMS was sent successfully.