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Huawei E3272

Is a WWAN Universal Serial Bus modem


  • 2G/3G/4G, up to 150 Mbps
  • 3 modes with corresponding Universal Serial Bus VID/PID
    • 12d1 / 1f01 for Mass storage mode - default on connection
    • 12d1 / 14db for RNDIS mode with HiLink
      • switch from mass storage to HiLink with usb-modeswitch: /sbin/usb_modeswitch -X -v 12d1 -p 15ca and replace V and D with the proper VID/PID
    • 12d1 / 1c05 for TTY mode


  • HiLink is the NAT mode, where the stick act as a RNDIS interface in Windows
  • TTY is the console mode, more compatible with Linux via Gammu for instance
  • This is required if you want to use the stick in Home Assistant for instance.
  • Open the case, and plug the device while shorting the boot pin
    • Next to the microSD card reader
    • Bottom right when looking at the stick with USB on top
    • 272
    • If successful, the device should appear as a TTY USB0 - check with ls /dev/*USB*
  • Download each repo and do a make:
    • git clone
    • You may need to apt install libz-dev
  • Download the firmware on routerunlock
    • AT interface should be present with firmware 21.420.07.00.00
    • USB loader should be present with firmware
      • But can erase your device! - Source
      • Better use the usblsafebin version on GitHub
  • Flash the USB loader: ./balong-usbdload/balong-usbdload -p /dev/ttyUSB0 balong-usbdload/usblsafe-327x.bin
    • Device should appear soon with 3 TTY interface
  • Flash the firmware: ./balongflash/balong_flash -p /dev/ttyUSB2 E3272s_Update_21.420.99.07.00.BIN
    • Try all 3 USB TTY if it doesn't work
  • Unplug & replug
  • Check if it worked:
    • On Linux host, you could see Mobile Broadband in the Network Manager
    • On Windows, try to connect to COMx via KiTTY
      • Issue the AT command
      • It should answer OK
  • Set the profile in the TTY: AT^SETPORT="FF;10,12" then AT^RESET

AT Commands

  • Always put a space at the end, before the command!
  • Multiple commands can be combined with ;
Commands Reply
AT OK to check the connection
ATI Basic informations
AT^FHVER Firmware info
AT^SETPORT? List current profile
AT^SETPORT=? List available profiles
AT^RESET Reset the device