<div dir="ltr"><div class="gmail_default" style="font-size:small">Good day,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Looking for some guidance on how to troubleshoot this, I have a Debian 11 with LE910C4-NF which we use with two hardware sim slots, so the active slot is always on slot 1 as far as mmcli is concerned. This vendor provides a cli to switch slots. I can switch to slot 2 for verizon and make a connection just fine with modemmanager. However on slot 1 with att, it just timeout. Even if I do verbose there isn't much information to go on. The strength shows 75%.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">I have an enterprise booster antenna, so I should be able to connect. On Debian 9 with a Sierra modem with qmi I can connect with att with <br><div style="color:rgb(197,194,214);background-color:rgb(41,38,64);font-family:Menlo,Monaco,"Courier New",monospace;font-weight:normal;font-size:14px;line-height:21px;white-space:pre"><div><span style="color:rgb(228,183,129)">sudo mmcli -m 0 --simple-connect='apn=our.custom.apn,ip-type=ipv4v6'</span></div></div></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">moxa@hostname:~$ mmcli -m 10<br>  ----------------------------------<br>  General  |                   path: /org/freedesktop/ModemManager1/Modem/10<br>           |              device id: a411abc5574ab456d4cd12c8decfcb87819a4b37<br>  ----------------------------------<br>  Hardware |           manufacturer: Telit<br>           |                  model: LE910C4-NF<br>           |      firmware revision: 25.20.668  1  [Mar 20 2020 12:00:00]<br>           |         carrier config: default<br>           |           h/w revision: 1.10<br>           |              supported: gsm-umts, lte<br>           |                current: gsm-umts, lte<br>           |           equipment id: 350344982749853<br>  ----------------------------------<br>  System   |                 device: /sys/devices/platform/soc/30800000.bus/30b10000.usb/ci_hdrc.0/usb1/1-1<br>           |                drivers: qmi_wwan, option<br>           |                 plugin: Moxa-Telit-LE910CX<br>           |           primary port: cdc-wdm0<br>           |                  ports: cdc-wdm0 (qmi), ttyUSB4 (ignored), ttyUSB5 (gps), <br>           |                         ttyUSB6 (at), ttyUSB7 (at), ttyUSB8 (ignored), wwan0 (net)<br>  ----------------------------------<br>  Status   |                   lock: sim-pin2<br>           |         unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3), sim-puk2 (10)<br>           |                  state: enabled<br>           |            power state: on<br>           |            access tech: lte<br>           |         signal quality: 100% (cached)<br>  ----------------------------------<br>  Modes    |              supported: allowed: 3g; preferred: none<br>           |                         allowed: 4g; preferred: none<br>           |                         allowed: 3g, 4g; preferred: 4g<br>           |                         allowed: 3g, 4g; preferred: 3g<br>           |                current: allowed: 2g, 3g, 4g; preferred: 4g<br>  ----------------------------------<br>  Bands    |              supported: utran-4, utran-5, utran-2, eutran-2, eutran-4, eutran-5, <br>           |                         eutran-12, eutran-13, eutran-14, eutran-66, eutran-71<br>           |                current: utran-4, utran-5, utran-2, eutran-2, eutran-4, eutran-5, <br>           |                         eutran-12, eutran-13, eutran-14, eutran-66, eutran-71<br>  ----------------------------------<br>  IP       |              supported: ipv4, ipv6, ipv4v6<br>  ----------------------------------<br>  3GPP     |                   imei: 350344982749853<br>           |          enabled locks: fixed-dialing<br>           |            operator id: 310260<br>           |           registration: idle<br>  ----------------------------------<br>  3GPP EPS |   ue mode of operation: csps-2<br>           |     initial bearer apn: nxtgenphone<br>           | initial bearer ip type: ipv4v6<br>  ----------------------------------<br>  SIM      |       primary sim path: /org/freedesktop/ModemManager1/SIM/8<br>           |         sim slot paths: slot 1: /org/freedesktop/ModemManager1/SIM/8 (active)<br>           |                         slot 2: none</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">moxa@moxa-tbbbb1182802:~$ sudo mmcli -m 10 --3gpp-scan --timeout=300<br>[sudo] password for moxa: <br>  ---------------------<br>  3GPP scan | networks: 311490 - 311 490 (lte, forbidden)<br>            |           313100 - 313 100 (lte, available)<br>            |           310260 - AT&T (lte, current)<br>            |           311480 - Verizon (lte, forbidden)<br>            |           310410 - AT&T (lte, available)</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Thank you,</div><div class="gmail_default" style="font-size:small">Fernando B.<br></div></div>