First of all, I don't think it's a problem with the card reader, because your
previous card reader can read the sim card. That means there is nothing wrong
with the card reader. Secondly, I think the problem may appear on the fpc,
because the previous sim card is a large card, and the current sim card is a
small card. Are their pins adjusted? I'm not sure about this,
According to the pin definition on the schematic diagram, combined with the pin
definition of the existing sim card, compared with the pcb of the fpc, there
may be new discoveries. I keep feeling like my fpc and phone link pins are
misaligned. This is my personal feeling, of course, the premise is that there
is nothing wrong with my server configuration. I also tried to test it with a
linux. Can you tell me how you tested it?
