H900-MT7621-v3.2.352 – April 2026

• Two related security issues in the IPsec PSK handling have been fixed. The PSK could be briefly written to standard output during service start, where it could potentially be captured in logs or diagnostic exports. The runtime secrets file holding the PSK was also readable by local non-privileged processes on the device. Remote access to the VPN is not affected. Customers using IPsec VPN are advised to upgrade as soon as possible and to rotate the PSK on each device after upgrading.

H900-MT7621-v3.2.348 – March 2026

• GPS TCP server can send DIO commands to set or get DIOs.
• Updated dropbear from 2019.78 to 2022.82
• Fixed SNMPv3 issue that when configured changed, SNMPv3 doesn’t work.
• Fixed BGP password issue.
• Added new option to enable both NSA and SA, only SA, only NSA on web page

H900-MT7621-v3.2.347

• Fixed GPS NTRIP issue that position is not stable.
• Added new options on DTU/GPS if it starts when router boot up.

H900-MT7621-v3.2.343

• Added option “on boot” on DTU and GPS, if it is unticked, DTU or GPS won’t start on boot.
• Check module status if it is not up after restart usb, then reinstall xhci driver.
• Fixed NTRIP issue that stuck sometimes.

H900-MT7621-v3.2.341

• Fixed Zerotier issue where change network ID failed.

H900-MT7621-v3.2.340 – October 2025

• Fixed issue that module 1 will drop when dialling module 2.
• Fixed issue that reboot one module, another module will reboot also.
• Fixed the non-robust code in SMS feature.

H900-MT7621-v3.2.339

• Added supported for slm770a.

H900-MT7621-v3.2.338

• Fixed issue that IP passthrough sometimes cannot work on rm520n.
• Supported dual em06 and rm500u+rm520n.

H900-MT7621-v3.2.337

• Added band lock option for rm500u.

H900-MT7621-v3.2.336

• Added IPv4v6 options on network–>mobile page for ep06.

H900-MT7621-v3.2.334 – June 2025

• Updated https certificate generate method,.

H900-MT7621-v3.2.333

• Fail-over feature triggers on signal strength status.

H900-MT7621-v3.2.332

• Added TCP server support,.
• Added GPS sync system time.
• Show GPS status on overview page.

H900-MT7621-v3.2.331 – April 2025

• Optimized dial process.
• Fixed issue that slm750 disconnects internet access every 21 hours when sms enabled.

H900-MT7621-v3.2.330

• Fixed PPTP server web GUI issue.

H900-MT7621-v3.2.329

• Added a monitor to check dhcp functionality.

H900-MT7621-v3.2.328

• Optimized mobile network dial process.

H900-MT7621-v3.2.327

• RM520N supports operator selection feature.

H900-MT7621-v3.2.326

• Fixed issue that l2tp server sometimes cannot add correct route for remote subnet.

H900-MT7621-v3.2.325 – December 2024

• Fixed issue Sierra Gobinet driver conflicts with Fibocom Gobinet driver.

H900-MT7621-v3.2.324

• Supported Fibocom modules.

H900-MT7621-v3.2.323 – October 2024

• Updated https cert files generate method, since the old way causes chrome refuses to access https web gui.
• Added option to enable saving system log and kernel log during reboot.

H900-MT7621-v3.2.321

• Fixed issue that 5g-nsa and 4g show signal strength 20 or 2.

H900-MT7621-v3.2.320

• Fixed issue that status routes cannot be deleted.

H900-MT7621-v3.2.319 – August 2024

• Optimized dial process.

H900-MT7621-v3.2.318

• Supported 2 modules h900-mt7621.

H900-MT7621-v3.2.317

• NtrIP added. the ntrIP sends the correction to serial port.
• Display gps coordinate on overview page.

H900-MT7621-v3.2.316

• Added oid for rm500q modem temperature.
• Added OID for VRRP status.

H900-MT7621-v3.2.315 – June 2024

• Removed UI Filebrowser page.
• Fixed several vulnerabilities of UI.

H900-MT7621-v3.2.314

• Added snmp oid for 5g rsrp,rsrq,sinr,.
• Added snmp oid for vrrp status.

H900-MT7621-v3.2.313 – June 2024

• Updated password generate algorithm.
• Added operator scanning for rm520/rm500q.

H900-MT7621-v3.2.312

• Added logic that if modem is not detected and icmp check is enabled, reboot router to get modem back.

H900-MT7621-v3.2.311

• Changed showing dns to IP in real time graphs connection page.

H900-MT7621-v3.2.310

• Added GPS status on overview page.
• Added GPS status gateway.
• Fixed issue that sim username/password has symbol $.

H900-MT7621-v3.2.309 – April 2024

• Fixed dio trigger sms issue.

H900-MT7621-v3.2.308

• Added bank lock for module rm520n-gl.

H900-MT7621-v3.2.307 – March 2024

• Fixed WIFI issue which introduced at v3.2.306.
• Added dio direction on web gui.

H900-MT7621-v3.2.306 – March 2024

• Updated nms for 5g.
• Fixed automatic apn issue.
• Fixed issue that modem may not dial after bootup.

H900-MT7621-v3.2.304

Added web gui to upload https certificate.

H900-MT7621-v3.2.303 – 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.

H900-MT7621-V3.2.302

• Fixed issue that firewall was disabled, then power on router, then enable firewall from web gui failed.
• Updated chinese transfer.
• Supported module rm500u.

H900-MT7621-v3.2.301

• Fixed rm520,rm500qgl cannot switch sim in fake poe h900.

H900-MT7621-v3.2.300

• Fixed issue that IP passthru keep disconnected and reconnected.

H900-MT7621-v3.2.298

• Fixed captive portal local auth issue.

H900-MT7621-v3.2.296

• Updated new WEBUI.

H900-MT7621-v3.2.295

• Fixed load balancing issue that one interface not show up sometimes.

H900-MT7621-v3.2.294

• Added new option pdp context since some networks cannot dial up with pdp id 1.

H900-MT7621-v3.2.291 – September 2023

• Fixed issue that sometimes SSH account cannot be changed from web gui.
• Show 5g module signal per antenna on page status–>network–>mobile.

H900-MT7621-v3.2.290

• Fixed mobile network selection.
• Fixed ep06 dial issue.

H900-MT7621-v3.2.289

• Rm520n support inner sim siwtch and outer sim switch.

H900-MT7621-v3.2.288 – August 2023

• Fixed dynamic routing password issue.
• Upgrade dial tool qua_cm to v1.6.5.
• Upgrade rm500q driver to v1.6.5.
• Added feature to run customized scrIPt in /etc/config/scrIPt.custom.
• Supported single IP as reemote subnet in IPsec.

H900-MT7621-v3.2.286 – June 2023

• Added auto apn feature.

H900-MT7621-v3.2.285

• Fixed IPv6 address show on overview page.
• Added auto apn,username and password functionality.
• Fixed IPsec server restart tunenel periodically.
• Removed 100~199 on strength item of overview page.
• Removed logs of failover.

H900-MT7621-v3.2.284

• Fixed issue with 1 module 2sims when switch from master to backup.
• Added IPv6 support for rm500q srm825.

H900-MT7621-v3.2.282

• Added web gui to force changing default password for specific customers.

H900-MT7621-v3.2.281 – March 2023

• Changed text of webgui system–>password.
• Fixed an issue that may cause lan cannot resolve DNS.

H900-MT7621-v3.2.279

• Fixed web username/password issue for nms 2.7.

H900-MT7621-v3.2.278

• Added support for em05,slm720.
• EoIP server option supports dynamic dns.
• Added zerotier in VPN.

H900-MT7621-v3.2.277

• Fixed slm750 sometimes cannot receive sms after boot up.

H900-MT7621-v3.2.275 – December 2022

• Updated uboot for error light blink on h900 and h685-5g.
• Added new option reboot device if wifi not detected at wifi config page.

H900-MT7621-v3.2.269 

• Fixed overview page port status issue.
• Removed -32768 rsrp rsrq of 5g from overview page.
• Removed useless button unsaved change.

H900-MT7621-v3.2.268 – October 2022

• Added new oid in snmp to indicate cell interface up or down with integer.

H900-MT7621-v3.2.267

• Added options to disable http and SSH at page network–>firewall–>security.

H900-MT7621-v3.2.266

• Fixed snmp issue that cannot read mobile status.

H900-MT7621-v3.2.265

• Fixed issue that dhcp renew restart l2tp interface.
• After save lan & wan configuration it will not redirect to interfaces overview page again.

H900-MT7621-v3.2.264

• Fixed issue that cannot ping lo IP when IPsec config lo IP as local subnet.
• Added mschapv2 on l2tp server.
• Don’t restart l2tp when cell interface dhcp renew.

H900-MT7621-v3.2.263 – July 2022

• Fixed loopback ping issue.
• Fixed firewall security default value issue.

H900-MT7621-v3.2.261

• Removed option extra ‘-m policy –strict –dir in –pol IPsec –proto esp’ in firewall config file.
• Added source zone for dmz.

H900-MT7621-v3.2.260

• Changed way to remove connect track table when firewall reload.
  Save modem status in backup files.
• Config interval of save system log and kernel log at system–>system–>logging.
• Fixed signal led issue of 1 module 2 sims.

H900-MT7621-v3.2.259 

• Added igmpproxy at network–>igmp proxy.

H900-MT7621-v3.2.258

• Added feature to restore/backup config files in flash.
• Fixed issue that wrong 5g rsrq and sinr values of rm500q.
• Added option to disable sIP alg in firewall.

H900-MT7621-v3.2.257

• Optimized dial process.
• Added option in network–>mobile to turn off modem radio if disable mobile network.
• Added new option in nms to choose nms server version.
• Removed default route created by qualcomm connect manager.
• Optimized 1 module 2 sims switch time.

H900-MT7621-v3.2.256 – May 2022

• Added feature sending sms when router boot up.

H900-MT7621-v3.2.255

• Added option “sIP alg” at page firewall.

H900-MT7621-v3.2.254

Fixed vulnerability.

Added new option check_interval for l2tp client.

H900-MT7621-v3.2.253

• Fixed vulnerabilities.
• Added l2tp failover.
• Fixed h900 time sync issue.

H900-MT7621-v3.2.251

• Added operator user and it is disabled as default.
• Added enable password on dynamic routing feature.
• Optimized rm500q status fetch process.
• Fixed diagnostics issue.

H900-MT7621-v3.2.250

• Added config page custom rules at network–>firewall.

H900-MT7621-v3.2.249

• Fixed diagnostics page issue.
• Added watchdog for nms.

H900-MT7621-v3.2.247

• Upgrade quectel driver from 1.6.2.9 to 1.6.3 for 5g routers.
• Fixed slm750 r2.0 gps issue.

H900-MT7621-v3.2.245 – December 2022

• Fixed issue 1 module 2 sim, and sim 1 and sim2 choose different network type.
• Updated SSH tool dropbear from 2015 to 2019.

H900-MT7621-v3.2.244

• Supported of u9300c.
• Supported slm750 r2.0.
• Supported quectel em160, gobinet mode.
• Slm750 IPv6 and IP pass thru.

H900-MT7621-v3.2.243

• Optimized one module 2 sim dial process.
• Fixed issue that after reset , cell cannot dial up. this issue is introduced in v3.2.242.

H900-MT7621-v3.2.242 – November 2022

• Added netmask option at page network–>mobile.
• Added IPv6 support on h820qo 2sim version.
• Added mib oids IPsecstatustable and grestatustable.

H900-MT7621-v3.2.241

• Added sms gateway.
• Added hotspot.
• Added pppd support on module ep06 and ec25.
• Added sim8200-ea on h685f.

H900-MT7621-v.3.240

• Added support of module sim8200ea-5g.

H900-MT7621-v3.2.239

• Fixed issue that module cannot dial up sometimes.

H900-MT7621-v3.2.234

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

H900-MT7621-v3.2.233

• Fixed issue that rm500q cannot switch to sim2.

H900-MT7621-v3.2.232

• When gre tunnel set to only receive, it will ping remote peer automatically.
• Added mib option for wan,lan1,lan2, lan3, lan4 physical status.
• Added mib option for arp count.

H900-MT7621-v3.2.227 – May 2021

• Parse gps coordiante with new way, add new option sync router time from gps time.

H900-MT7621-v3.2.226

• Changed rm500q sim switch in router, not in module.

H900-MT7621-v3.2.225

• Added hide ssid option for h700 2.4ghz wifi.
• Added band lock for rm500q sa.
• Updated icmp check, add options “ping packet size” and “start ping after cell up”.

H900-MT7621-v3.2.224

• Added direction 1 on openVPN option tls_auth if tls_auth is enabled.
• Updated forge module cm tool to fix srm815 sa issue.

H900-MT7621-v3.2.223 – October 2021

• Added IPv6 support for module slm750.

H900-MT7621-v3.2.222

• Added srm815 sa network status support.
• Updated srm815 driver and cm tool for 5g sa.

H900-MT7621-v3.2.221

• Added rm500q sa network status support.
• Fixed issue that eoIP flapping.
• Fixed issue that snmp doesn’t have cell 2 status.