What should I do if the red rice phone can't detect the SIM card?

Unable to detect the SIM card problem. We recommend that you:

Enter "*#06#" on the dial to see if the IMEI number of the mobile phone is normal. If there is no IMEI number, it is recommended to back up the data before going to Xiaomi Authorized Service Center for testing.

Reinstall or remove the SIM card and wipe the metal chip area of the SIM card with rubber or alcohol, and then try again;

Enter * # * # 64663 # * * in the dialing interface to enter hardware detection, and select "SIM card detection" to check whether the SIM card status is inserted; If it shows that there is no SIM card or the SIM card is not inserted, you can replace the SIM card. If it can be detected after replacement, you can consider going to the operator's business hall to replace the current SIM card.