> This worked on a bunch of QMI based devices, so I have to assume that > this fails on Sierra? If so, then this probably should be quirked to > be Sierra-specific behavior. E.g. via a mechanism similar to > drivers/atmodem/vendor.h IMSI reading on my MC7430 modem do fail without this patch. I have the following traces in this case: Jan 5 11:08:41 klk-lpbs_040070 daemon.debug ofonod[869]: ../ofono-1.19/drivers/qmimodem/sim.c:qmi_read_transparent() file id 0x6f07 path len 0 Jan 5 11:08:41 klk-lpbs_040070 daemon.debug ofonod[869]: ../ofono-1.19/drivers/qmimodem/sim.c:read_generic_cb() Jan 5 11:08:41 klk-lpbs_040070 daemon.err ofonod[869]: Unable to read IMSI, emergency calls only

> > ofono_sim_remove will call .remove method. So this is likely to cause > a crash since uim and dms have already been unref-ed. OK, I have not tested this error case. The "qmi_service_unref(data->uim)" that's here in this function without the patch must cause the same crash.