I am developing my own custom PCB using BC95-G Module.
Currently, the module cannot detect the SIM Card.
After sending 1.8V and 3.3V pulses, USIM_VDD goes back to 0V.
I used the schematics provided in the hardware design guideline as shown in the figure.
The only difference is that I connected system GND to USIM_GND.
My question is,
Is this the reason why the module can’t detect the SIM Card?