H820-7628_v3.3.x Firmware Downloads

This page contains firmware levels for the Latest H820 4G router hardware version (From January 2023). This model can be easily identified physically as they have 2x WIFI connectors. The firmware series is H820-7628_v3.3.x.

Units from Pre January 2023 are an older version using Firmware H820-RT5350-v3.2.x , click here to navigate to the H820-RT5350-v3.2.x page.

Applicable Part number:

  • H820t-W

(The part number is found on the underside label of the router).

Changelog

H820-7628_v3.3.87 – October 2025

  • Implemented the use of separate IKEv2 ESP for multiple subnets.
  • Improved the robustness of code in SMS feature.

H820-7628_v3.3.85 – June 2025

  • Added support SLM770A CE.

H820-7628_v3.3.79 – December 2025

  • Added support for SLM770 and EC200A.

H820-7628_v3.3.78 – November 2024

  • Fixed issue that configuration in wizard not saved after power off and power on.

H820-7628_v3.3.77 – October 2024

  • Fixed route based IPSec issue. need to config VTI static IP on IPSec config page.
  • Fixed issue where RM500 shows SIM error and 0 signal strength on web GUI.

H820-7628_v3.3.75 – October 2024

  • Updated uhttpd. 
  • Updated HTTPS cert files generation method.
  • Added option to enable saving system log and kernel log during reboot.

H820-7628_v3.3.73 – September 2024

  • Added Modbus registers for modem status. like coordinate, strength, rsrp, rsrq, etc.
    register 1~2, longitude
    register 3~4, latitude.
    register 5, satellites number.
    register 6, strength.
    register 7, rsrp.
    register 8, rsrq.
    register 9, sinr.
    register 10~15,product ID, like H820T-w.
    register 16~27 network name.
    register 28~39 SN.
    register 40~47 IMEI.
    register 48~55 mobile interface IP.
    register 56~63 firmware version.

H820-7628_v3.3.70 – August 2024

  • Fixed language issue at page System–>Language.

H820-7628_v3.3.69 – August 2024

  • Added Modbus support GPS coordinate and modem signal strength.

H820-7628_v3.3.68 – August 2024

  • Fixed issue with IPSEC/L2TP, where sometimes l2tp is not started properly.

H820-7628_v3.3.67 – June 2024

  • Fixed several vulnerabilities of UI.

H820-7628_v3.3.66 – May 2024

  • Fixed issue where WIFI password doesn’t change after resetting when unique password is enabled.

H820-7628_v3.3.65 – May 2024

  • Update password generation algorithm.
  • Changed from DNS to IP at real time graphs connection page.
  • Added GPS status on overview page.
  • Added GPS status gateway.
  • Fixed issue that caused SIM username/password to have $ symbol.
  • Added option to change logo background color. 
  • Added TCP server option on GPS config page.

H820-7628_v3.3.59 – May 2024

  • Updated NMS.

H820-7628_v3.3.58 – January 2024

  • Save config files in flash as backup automatically.
  • If config via UCI command or edit files in SSH, it requires to run command “save_flash”.
  • Removed Flash Backup and Restore at page System–>Back / Restore.
  • Force to change password, new password can be same as default.
  • Fixed reboot GUI issue.
  • Fixed upload logo issue.

H820-7628_v3.3.57 -November 2024

  • Added support for module EC200.

H820-7628_v3.3.56 – October 2024

  • Added No-IP support in DDNS.

H820-7628_v3.3.55 – October 2024

  • Updated new web UI.

H820-7628_v3.3.53 – September 2023

  • Fixed issue where ipv6 up but cell led is not on. 
  • Updated operator selection.

H820-7628_v3.3.52 – August 2023

  • Added feature to run c script in /etc/config/script.custom .
  • Fixed dynamic routing password issue.

H820-7628_v3.3.44 – March 2023

  • Added support for longer SMS.
  • Changed text in the ‘Password’ page for WEBUI.