After updating to version 1.0.13.0 UMRINXM My cell phone stopped recognizing my SIM CARD

After updating to version 1.0.13.0 UMRINXM My cell phone stopped recognizing my SIM CARD. The problem is that I can't downgrade. And to unlock the bootloader you need to have a SIM. And this model doesn't support it and yes I'm in a totally inelegant problem. I hope Xiaomi resolves this issue as soon as possible.