<div dir="ltr"><div dir="ltr"><div dir="ltr">Hello Aleksander, </div><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">> I am developing an application making use of libmm-glib high level API and I am using a EM7455 Sierra Wireless modem. The modem is working under MBIM mode (usb-composition).<br>
><br>
> I believe the issue I am experiencing is related to the change of operator / SIM card. The scenario is the following:<br>
><br>
> The first SIM card I introduce is able to register in the network and connect using the APN I specify in order to establish a connection.<br>
> I tell the modem to change the SIM card via internal AT command and I perform a system reboot (just to ensure everything starts fresh)<br>
<br>
With system reboot you mean a modem reboot? Or a host system reboot?<br></blockquote><div><br></div><div>I have tried both, but the one I usually do is a host system reboot to ensure a system fresh start. </div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
> After the reboot and after waiting some time (>5-10 minutes) the Modem is not able to register in any network and the signal quality is never updated.<br>
<br>
As you said, this should have been automatic. There's no state stored<br>
in MM that would affect this IF you did a full host system reboot OR a<br>
full modem reset. In both those cases, any state associated with the<br>
earlier exposed modem would have gone.<br>
<br>
To me this looks like a problem with the actual SIM card. Have you<br>
tried to start with that 2nd SIM card first, and switch to the<br>
original one to see what happens?<br></blockquote><div><br></div><div>Ok, it's good to know that the Modem Manager does not store any APN/connection-related information between reboots. </div><div>However, whenever I try to do what you mention I find similar issues. What I experiment is that I am only able to connect using the SIM I have introduced in the first place. </div><div>
It does not matter if I make a reboot, that will be the SIM with which I will be able to connect no matter I try to use it in first place or second (like if the modem stored some
APN/connection
info)</div><div><br></div><div>I will make some more tests but it seems it may be a Modem issue. </div></div><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Kind regards,</div><div>Alejandro Vega</div></div></div></div></div>