⚠️ Custom firmware may break VoLTE, carrier aggregation, or SIM detection.
In 2023, security researchers found a backdoor in several popular 4G router models that allowed hackers to inject malicious DNS settings. The fix? A firmware patch. If you do not update, your banking traffic could be routed through a server in Russia without your knowledge. Vulnerabilities in web interfaces (like CVE-2021-32557) are discovered monthly. 4g lte wifi modem firmware