ELASTEL TECHNOLOGY CO., LTD.
Check the device:
$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
Bus 001 Device 003: ID 1a86:55d2 QinHeng Electronics USB Dual_Serial
Bus 001 Device 002: ID 1a86:8091 QinHeng Electronics USB2.0 HUB
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ dmesg
[ 3.563608] usbserial: USB Serial support registered for GSM modem (1-port)
[ 3.564137] option 1-1.2:1.0: GSM modem (1-port) converter detected
[ 3.574237] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 3.574645] option 1-1.2:1.1: GSM modem (1-port) converter detected
[ 3.575282] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 3.601785] qmi_wwan 1-1.2:1.4: cdc-wdm0: USB WDM device
[ 3.603381] qmi_wwan 1-1.2:1.4 wwan0: register 'qmi_wwan' at usb-fe9c0000.xhci-1.2,
WWAN/QMI device, xx:xx:xx:xx:xx:xx
[ 3.603654] usbcore: registered new interface driver qmi_wwan
[ 3.603691] option 1-1.2:1.2: GSM modem (1-port) converter detected
[ 3.609664] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 3.610081] option 1-1.2:1.3: GSM modem (1-port) converter detected
[ 3.610498] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB3
$ ifconfig -a
……
wwan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 169.254.58.161 netmask 255.255.0.0 broadcast 169.254.255.255
inet6 fe80::9e8a:5252:d4c8:15cb prefixlen 64 scopeid 0x20<link>
ether c6:00:46:68:12:80 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
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