The new firmware may disable Wi-Fi by default due to regional regulations. Go to Network → WLAN and re-enable it. Also, check that the country code is set correctly (e.g., US, EU, BR).
The is a critical component that determines whether your fiber internet soars or stumbles. While updating can resolve bugs and security flaws, the process is fraught with peril due to ISP locks and hardware revisions. firmware modem alcatel lucent i-240w-a