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.