BG95-M3 USIM not Powering ON

Good Morning,
I’m developing my dissertation with a BG95-M3 modem. I’m trying to perform network registration but did not succeed because the SIM gets errors “(U)SIM failure” and “(U)SIM not inserted”. Then I noticed that the USIM slot was just powered ON for a few seconds when the modem is turning ON, then just goes to 0v. I believe the schematic is fine (image attached). I use just 6 pins and the (U)SIM Card Detection is disabled. So, there is some command to turn on the USIM slot, to start receiving power?

Best Regards,

pls confrim the voltage of sim is 3.3 v or 1.8v , for bg95 ,we support 1.8v


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The card slot may be in poor contact, whether the line welding is abnormal, and whether the package of the card base is correct

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