My Redmi k30 5g version suddenly can't recognize the sim card?

The mobile phone cannot recognize the SIM card, so I suggest you:

1. Enter "*#06#" on the dial to check whether the IMEI number of the mobile phone is normal. If there is no IMEI number, you can go directly to Xiaomi Authorized Service Center for testing.

2. Reinstall the SIM card (pay attention to whether the orientation of the SIM card chip and the card holder is correct, and there will be a schematic diagram of the corresponding SIM card placement method on the card holder). If it is still unrecognizable, please take out the SIM card and wipe the metal chip area of the SIM card with rubber or alcohol, and then try again.

3. Enter * # * # 64663 # * * in the dialing interface to enter hardware detection, and select "SIM card detection" to check whether the SIM card status is inserted.

A. If there is no SIM card or the SIM card is not inserted, try to replace the SIM card, but the SIM card is still not detected. You can return to the factory or brush the machine. If it still doesn't work, you can go to Xiaomi Authorized Service Center for testing.

B. If the SIM card can be detected after replacement, please go to the operator's business hall to replace the SIM card and try again.