The second slot for the SIM card does not work, how to fix it?

Question

Android

The xiaomi redmi note 8 pro phone stopped recognizing the second sim card slot (the one that is either a flash card or a sim). At the same time, the flash drive reads normally. I tried to change SIM cards in places, I tried banal tips from articles. The phone does not see the SIM card from the second slot at all. At the same time, everything was ok before, the phone did not fall, did not get wet, it is constantly in the case.

Answer 1

Take it to a service center.