H820-RT5350-v3.2.x Firmware Downloads

This page contains firmware levels for the older H820 4G router hardware version (Pre January 2023). This model can be easily identified physically as they have 1x WIFI connector only. This model cannot be upgraded to newer firmware series.

The newer H820 4G routers after January 2023 use the later firmware series H820-7628_v3.3.xx and also have updated hardware, they are physically identifiable by their 2x WIFI connectors. For this firmware series follow this link to the relevant page.

Applicable Part number:

  • H820t-W

(Pre January 2023) = Firmware H820-RT5350-v3.2.xxx = Physical difference (1x WIFI connector)

(Post January 2023) = Firmware H820-7628_v3.3.xx = Physical difference (2x WIFI connector)

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

Changelog

H820-RT5350-v3.2.354 – June 2025

  • Added check for HTTPS cert and key files, if it was generated by old method, it they are regenerated. 
  • Updated HTTPS certificate generation method.

H820-RT5350-v3.2.326 – March 2024

  • Fixed an issue that cased the modem to not dial after bootup occasionally.
  • Update RMS.

H820-RT5350-v3.2.323 – 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.

H820-RT5350-v3.2.314 – September 2023

  • Fixed issue that sometimes SSH account cannot be changed from web GUI.
  • Fixed Huawei me906s module dial issue.

H820-RT5350-v3.2.308 – June 2023

  • Updated module status in temporary file.
  • Added auto APN, username and password functionality.

H820-RT5350-v3.2.293 – September 2022

  • Added options to disable HTTP and SSH at page Network–>Firewall–>Security.

H820-RT5350-v3.2.291 – July 2022 

  • Added option for device at QoS config page.

H820-RT5350-v3.2.288 – May 2022 

  • Added option to disable SIP ALG in firewall.

H820-RT5350-v3.2.268 – August 2021 

  • Updated OpenVPN from v2.3.6 to v2.4.7.

H820-RT5350-v3.2.264 – June 2021 

  • DIO1~DIO4 as modbus slave.
  • Parsing of GPS coordiantes changed, added new option to sync router time from GPS time.

H820-RT5350-v3.2.259 – February 2021

  • Added IPv6 support for module SLM750

H820-RT5350-v3.2.245 – September 2020

  • Added band 7 option at mobile config page for EC25.
  • Set wifi name for comset.

H820-RT5350-v3.2.243– September 2020

  • Removed SMS send page.
  • Fixed WIFI SMS command issue which only open/close WIFI for a several hours.

H820-RT5350-v3.2.225 – March 2020

  •  Fixed DTU via 0x0D after 0x0A.