编辑：问题已解决。我把 SIM 卡插反了——在 Widonws 上检查了一下，它给了我提示
我有 E3276 调制解调器，它闪着蓝光
kamil@kamil-K53SV:~$ lsusb
Bus 002 Device 003: ID 12d1:1506 Huawei Technologies Co., Ltd. Modem/Networkcard
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 04f3:0234 Elan Microelectronics Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0bda:0139 Realtek Semiconductor Corp. RTS5139 Card Reader Controller
Bus 001 Device 003: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
我曾经按照以下命令连接到互联网：
kamil@kamil-K53SV:~$ sudo usb_modeswitch -v 12d1 -p 14fe -M '55534243123456780000000000000011062000000101000100000000000000'
Look for default devices ...
No devices in default mode found. Nothing to do. Bye!
kamil@kamil-K53SV:~$ sudo usb_modeswitch -v 12d1 -p 1506 -M '55534243123456780000000000000011062000000101000100000000000000'
Look for default devices ...
Found devices in default mode (1)
Access device 003 on bus 002
Get the current device configuration ...
Current configuration number is 1
Use interface number 0
with class 255
Error: can't use storage command in MessageContent with interface 0; interface class is 255, expected 8. Abort
现在它不起作用
我也尝试过： https://askubuntu.com/a/700387/755206 和
sudo nano /etc/modules
usbserial vendor=0x12d1 product=0x1506
我怎样才能让它再次工作？