The purpose of this document is to describe how to enable 3G modem in i.MX sabresx board for Android software.
Unlike other boards of I.mx series, in sabresx board 3G modem doesn't share to use PCIE slot any longer. It is not connected with PCIE slot by default. So if you still want to use 3G modem like in sabresd board. You need to do a tiny hardware rework. Like the below, R177 and R178 is DNP. Just add a zero resistor here.
After you have do hardware rework above, then you should git am the attached patch to add software support which will add the dts config of 3G power. In our official release version, we don't include this patch.