: Never turn off the router or disconnect the power during the upgrade process, as this can "brick" the device, making it unusable. latest firmware version specifically for an Airtel or Nokia branded unit? What Is Firmware? Types And Examples - Fortinet

A: Every 12–18 months or when release notes mention “full flash recommended.” For security patches, incremental updates suffice.

Updates internal security certificates and patches backdoors to prevent malicious actors from gaining unauthorized physical or remote access to your local area network. Phase 1: Pre-Upgrade Requirements

A "full" upgrade review highlights that while performance is often optimized before shipping, manual updates can fix critical issues such as settings not saving via telnet or specific connection drops. Core Upgrade Benefits