The default connection is that sim #2 is connected to primary CF3’s uim2. But now I need to connect sim #2 to secondary CF3 because only the chip on this slot supports the RAT of my sim. How can I do this?
I read in the DV4 that it can be done by wither API command and hardware modification. I know the hardware method has to be done by un-soldering and soldering the tiny resistor. Thus the API command way is more suitable for me. But how can I access the pins on the GPIO expander when I code? I need to access the GPIO expander because the UIM signal is located at expander 2’s I/O_6 and 7.