When does the Samsung mobile phone always show that the sim card is not plugged in?

According to your description, I suggest you try the operation according to the following steps:

1. Turn it on and off again, and check whether the mobile phone card is inserted in place and correctly.

2. Take out the SIM card and clean the metal contacts of the SIM card with rubber. (Is the sim card in poor contact? )

3. Try to replace the sim card (regardless of whether the SIM card is aging or damaged).

4. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings.

If the problem still exists, it is recommended that you send your mobile phone to the nearest Samsung service center for testing and maintenance.

For specific questions about the service center, please visit:

. Samsung . com/support/service locations . ASP

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