I'm working on an Android AOSP 4.0.4; I've currently plugged a PCIe modem on board and added a SIM card; modem is 5350 SIMCom, but I can't let it work. My impression is that is not recognized at all by kernel. Because I haven't a specific modem driver for Android, I followed instructions for Linux drivers and defined a custom RIL. It seems that the modem is not recognized at all, but first question: PCIe modem should be linked to a ttyUSB? Are there any options to be changed for building an AOSP that recognize the modem?
Thank you for your support!