Hi, I have a similar problem [1] with a SIM7600SA modem. With the SIM cards from one provider, there are no problems, but the SIM cards from another provider can cause this issue.
[1] https://github.com/openwrt/packages/issues/23171 Cheers, Yegor On Mon, Feb 5, 2024 at 1:20 PM Ralf Glaser <gla...@iotmaxx.de> wrote: > > Hi, > > i'm seeing similar (not necessarily related) problems with an EC21 when using > Telefonica SIM cards (other cards work fine, these work sporadically). It > seems as if those cards have a longer startup time. With the following patch > the cards work most of the time (ModemManager 1.18.6): > --- > src/mm-iface-modem.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/src/mm-iface-modem.c b/src/mm-iface-modem.c > index 8bf0893c01a2..be05bf4a7a8b 100644 > --- a/src/mm-iface-modem.c > +++ b/src/mm-iface-modem.c > @@ -420,7 +420,7 @@ mm_iface_modem_abort_invocation_if_state_not_reached > (MMIfaceModem *sel > * are modems on which the SIM takes more than 15s to be ready, luckily, > * they happen to be QMI modems where the SIM's iccid in load_sim_slots > * lets us know that there is a sim */ > -#define MAX_UNLOCK_REQUIRED_RETRIES_NO_SIM 6 > +#define MAX_UNLOCK_REQUIRED_RETRIES_NO_SIM 30 > #define MAX_UNLOCK_REQUIRED_RETRIES_SIM_EXISTS 30 > > /* Time between retries */ > > I have no idea why this patch is working since the EC21 is a QMI modem which, > according to the comment, should not be affected by this... > > If someone with a deeper understanding of ModemManagers internals would like > to look into this i would be happy to offer my support. > > Best regards, > Ralf > > > ________________________________ > Von: ModemManager-devel <modemmanager-devel-boun...@lists.freedesktop.org> im > Auftrag von Daniel Edwards <daniel.edwa...@q-yachts.com> > Gesendet: Donnerstag, 1. Februar 2024 17:48 > An: modemmanager-devel@lists.freedesktop.org > <modemmanager-devel@lists.freedesktop.org> > Betreff: Assistance Needed with SIM Card Issue Causing QMI Operation Failures > > Hi, > > I'm reaching out to seek guidance regarding an issue I've been experiencing > with ModemManager, specifically related to certain SIM cards causing QMI > operation failures, which ultimately leads to the modem being marked as > invalid. > > To give you a brief overview, the modem still responds to AT commands and > shows that it's connected and registered to the correct home network, but the > modem will not show in mmcli -L, and the device will stay unconnected. With > other SIMs it will work fine. > > The modem is a SIM7600G. > > Here is a log with --debug enabled https://sprunge.us/UR3gvX > > Sometimes the problematic SIM will work and connect the device to the > internet, but I have not found a way to reliably recreate this scenario. > > Cheers, > > Daniel Edwards > Q Yachts Oy > > Technical Engineer > >
