For technical details and official documentation, refer to the following Nokia FastMile Support pages:
: You can access advanced settings by connecting to the gateway's Wi-Fi and navigating to the admin page (usually 192.168.1.1 or the address printed on the bottom of the device).
If your gateway is performing poorly, first try factory resets, repositioning, and contacting your provider. Only in extreme cases – and with signed disclaimers from your ISP – should you consider manual firmware intervention.