Tip: Search for “[Your modem model] firmware download” – stick to .exe updaters from official domains.
Firmware files can contain malicious code. In 2020–2023, some fake “HSPA modem firmware” sites distributed spyware that rerouted HTTP traffic. hspa usb modem firmware update
Also, outdated firmware could be vulnerable to USB Rubber Ducky style attacks or SIM card exploits (e.g., CVE-2020-16280 on some Huawei sticks). If security is critical (corporate travel, journalists), updating is more important. Tip: Search for “ [Your modem model] firmware
Depending on the brand, specific tools are required: Firmware files can contain malicious code
Warning: Flashing firmware carries a significant risk of rendering the device unusable ("bricking").