Is it possible to use the QMI SDK and drivers (sierra GobiNet and GobiSerial) with dell pid&vid?
My VID is 413c and PID is 81b6. Only have one interface, cdc_wdm0. We can’t change vid&pid with AT command 
Your modem is in MBIM mode. You will have to switch it to QMI for GobiNet. But if you do, then it should only be a matter of adding the Dell IDs to those drivers.
Is the switch possible by an MBIM command? Only have mbim interface (haven’t qmi or at interface).
Best regards
This perl hack should be able to do it: git.mork.no/wwan.git/plain/scrip … usbcomp.pl
But I am sure Matt will not approve of that, and he probably has good reasons not to 
This most certainly can brick the modem. At least make it rather difficult to fix. BTDT.
The perl script should be safer than the NVU based method I saw referred to in another thread, though I don’t want to remove those old docs, but they are not something I will point anyone to… I do not have the resources to help unbricking the results.
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.210990] usb 1-1: new high-speed USB device number 2 using ehci-pci
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.369467] usb 1-1: config 1 has an invalid interface number: 8 but max is 3
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.369469] usb 1-1: config 1 has no interface number 1
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.380346] usb 1-1: New USB device found, idVendor=413c, idProduct=81b6
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.380348] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.380349] usb 1-1: Product: DW5811e Snapdragon™ X7 LTE
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.380350] usb 1-1: Manufacturer: Sierra Wireless, Incorporated
Apr 24 20:50:22 elmemis-VirtualBox kernel: [ 90.380351] usb 1-1: SerialNumber: LF62075045031013
Apr 24 20:50:23 elmemis-VirtualBox mtp-probe: checking bus 1, device 2: "/sys/devices/pci0000:00/0000:00:0b.0/usb1/1-1"
Apr 24 20:50:23 elmemis-VirtualBox mtp-probe: bus: 1, device: 2 was not an MTP device
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.620373] usbcore: registered new interface driver cdc_wdm
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.626523] qmi_wwan 1-1:1.8: cdc-wdm0: USB WDM device
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.628344] qmi_wwan 1-1:1.8 wwan0: register 'qmi_wwan' at usb-0000:00:0b.0-1, WWAN/QMI device, 2e:d9:9a:df:40:a9
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.628544] usbcore: registered new interface driver qmi_wwan
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.638751] usbcore: registered new interface driver usbserial
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.638809] usbcore: registered new interface driver usbserial_generic
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.638821] usbserial: USB Serial support registered for generic
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.645402] usbcore: registered new interface driver qcserial
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.645411] usbserial: USB Serial support registered for Qualcomm USB modem
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.647516] qcserial 1-1:1.0: Qualcomm USB modem converter detected
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.647612] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB0
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.651104] qcserial 1-1:1.2: Qualcomm USB modem converter detected
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.651237] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB1
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.655369] qcserial 1-1:1.3: Qualcomm USB modem converter detected
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.655503] usb 1-1: Qualcomm USB modem converter now attached to ttyUSB2
Apr 24 20:50:23 elmemis-VirtualBox kernel: [ 90.662224] qmi_wwan 1-1:1.8 wwp0s11u1i8: renamed from wwan0
Apr 24 20:50:23 elmemis-VirtualBox NetworkManager[821]: <info> [1493077823.2762] devices added (path: /sys/devices/pci0000:00/0000:00:0b.0/usb1/1-1/1-1:1.8/net/wwp0s11u1i8, iface: wwp0s11u1i8)
Apr 24 20:50:23 elmemis-VirtualBox NetworkManager[821]: <info> [1493077823.2762] device added (path: /sys/devices/pci0000:00/0000:00:0b.0/usb1/1-1/1-1:1.8/net/wwp0s11u1i8, iface: wwp0s11u1i8): no ifupdown configuration found.Switch to qmi mode with perl script. When you run qmi-firmware-update the same things happens. Send the command reboot (to download mode) but never restart
Convert to 1199:9071 neither works.
Try with windows and neither works. AT! RESET does not work. The LED goes off, but does not reset the modem.
Hi,
Based on all related information, I believe nothing wrong with “qmi-firmware-update” and looks like “device timeout” to be at “qdl” mode. Why not try updating that em7455 via windows using sierra firmware update tools “fdt.exe”. I’ve done previously, where that tool will triggering “qdl” port together with other processes.