SIM card not working in custom board

Hi all

I have a problem with the sim card on our custom board. Earlier I tested my code on nrf9160dk. But on the custom board, the sim card is not recognized.
There is no voltage on the SIM_V1.8 pin. I tried to send the command "AT+CFUN=41", but it did not help. 
The firmware version of the modem is v1.3.1, since I'm using SDK version 1.8. 

From all this, I wanted to know if there is any special setting for custom boards, not DC?