On 2025-03-07, Samuel Jayden <samueljaydan1...@gmail.com> wrote: > Has anyone encountered a similar issue
yes - but I gave up on the idea and used an external LTE router instead. >> 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 devic= > e. >> However, rebooting is not a guaranteed solution=E2=80=94sometimes, it tak= > es 4-5 >> consecutive reboots before umb0 becomes functional. In some cases similar symptoms are due to "fcc lock" not being unlocked correctly though this "sometimes it works after a reboot" doesn't sound quite like that. >> *P.S.* The device has a single LTE module but dual SIM slots. That probably doesn't help, such devices usually need a gpio toggling (and maybe a modem reset) to change the slot. Does it work in umsm mode? Do you _have_ to use mbim?
