How Xiaomi 2 saves important short messages?

If it's not too much trouble, you can try to save important short messages in the Sim card so that they won't be lost or easily seen by others. Method: Long press the message to be saved, select more and collect it. Then exit to the SMS start interface, enter the collection, click on the message just now, and select Save to sim card. So the text message will be copied to the calling card. Then delete the short messages in the collection, even if the original short messages are deleted, they will not be lost. To view the SMS of the sim card, in the SMS interface, press menu key 3 to enter Settings, Advanced Settings and manage the information in the sim card. I just can't see the message from the sender. Above.