Eg912u-gl can't see any sim card connected

hello, we have EG912U-gl module, irt is powered on and it accept AT command but in no way it can see the sim card, in any of the 2 sim channel, pin VDD don’t send any power supply to the sim card. it is always at 0v. is there any way to enable sim card comunication?

Hi @federico_tempesta
Is this the same when changing another SIM card?