关于替换LTE 4G USB MODEM with Wi-Fi HotSpot固件或关闭Wi-Fi热点功能的技术咨询

Hey there, let's walk through some practical approaches to fix your problem—since your Qualcomm V2.3.7 modem's official settings don't let you turn off the Wi-Fi hotspot, we'll explore alternative methods to get this done:

一、尝试挖掘隐藏设置或启用Telnet/SSH访问 #

Most of these budget Chinese modems hide advanced controls or have hidden access ports you can leverage:

• First, try accessing the device via Telnet or SSH:
  1. Open your computer's command prompt (Windows) or terminal (Linux/macOS), then run telnet 192.168.100.1 or ssh admin@192.168.100.1. Default credentials are usually admin/admin, user/user, or the same ones you use for the web settings page.
  2. If you log in successfully, look for Wi-Fi-related config files (common paths like /etc/config/wireless vary by device). Find the parameter controlling Wi-Fi status and set disabled to 1, then reboot the modem to apply changes.
  3. If Telnet/SSH isn't enabled, check for hidden web pages: try appending paths like /advanced.html or /hidden_settings.html to the device's IP in your browser. You can also press F12 to open developer tools on the settings page, and look for hidden buttons/links that aren't displayed visually.

二、固件替换的可行性与风险 #

Replacing the firmware is trickier with these white-label devices, but here's what you can try:

• Since your modem uses a Qualcomm V2.3.7 platform, search for firmware mods or tutorials specific to this model (try keywords like "Qualcomm V2.3.7 modem disable Wi-Fi firmware"). Important: Flashing firmware carries a risk of bricking your device—only use firmware confirmed to match your exact hardware.
• Check the factory reset button's recovery mode: when you hold it down, do the indicator lights flash rapidly? If so, this might be a flashing mode. You could use Qualcomm's official tools like QPST to read/write firmware, but only if you can find a compatible firmware image—misusing the tool will break your modem.

三、临时替代方案 #

If the above methods don't work right away, these quick fixes can help:

• Set the Wi-Fi SSID to be hidden (non-broadcasting) — it won't be visible to other devices, effectively acting like it's turned off (though it's still running in the background). If available, turn down the Wi-Fi transmission power to the lowest setting.
• If you're comfortable with hardware tweaks (and don't mind voiding warranty), you could open the device and disconnect the Wi-Fi antenna—this will prevent any Wi-Fi signal from being broadcast.

A quick note based on what you shared:

You mentioned that entering an invalid SSID with ? caused the device to malfunction. These budget modems often have unstable firmware, so avoid modifying settings with special characters to prevent needing frequent factory resets.

备注：内容来源于stack exchange，提问作者monandszy