Hello again, Has anyone encountered a similar issue or have any insights on potential debugging approaches? Any guidance would be greatly appreciated.
Looking forward to your thoughts. Best regards, Sam On Thu, Mar 6, 2025 at 1:28 PM Samuel Jayden <samueljaydan1...@gmail.com> wrote: > Hello OpenBSD, > > > I am experiencing a peculiar issue with a device in which I use a Sierra > Wireless EM7455(*) LTE module that I have converted to MBIM mode. I have > also disabled umsm by entering config -e -f /bsd. > > Most of the time, the umb status on my device appears as *"SIM not > inserted PIN required,"* even though a SIM card is physically inserted. > The only scenario in which I achieve success is after rebooting the device. > However, rebooting is not a guaranteed solution—sometimes, it takes 4-5 > consecutive reboots before umb0 becomes functional. > > How can I debug this issue? > > For further context, I have also swapped out the LTE module with another > unit, yet I observe the same behavior across 5-6 different devices of the > same make and model. > > *P.S.* The device has a single LTE module but dual SIM slots. > > (*) > addr 03: 1199:9071 Sierra Wireless, Incorporated, Sierra Wireless EM7455 > Qualcomm Snapdragon X7 LTE-A super speed, power 126 mA, config 1, rev 0.06 > , iSerial LF10770712011033 driver: umb0 driver: ugen0 > > Also dmesg is attached via this email. > > Thanks in advance. > >
