Call your ISP and ask if a new firmware version is available for your model. Sometimes they can trigger a remote update.
: If you are experiencing issues like devices not connecting to the 5GHz band even with an updated firmware, you may need to adjust your Wi-Fi channels or disable "Smart Connect" (SSID steering). If you'd like more tailored advice, please let me know: Who is your Internet Service Provider ? What is your current firmware version ? firmware for nokia g2425ga new
No. GPON link speed is capped by hardware and ISP provisioning, not firmware. Call your ISP and ask if a new