The most reliable and free way to unlock your gateway is through the carrier it was originally purchased from (e.g., Rogers, T-Mobile, Optus).
💡 Before paying for an unlock, log into your gateway dashboard. If there is no field to enter an unlock code when a foreign SIM is inserted, the software is likely "hard-locked," and a code alone won't help. To give you more specific steps, I'd need to know: Which carrier is the device currently locked to? Do you have access to the web admin panel ? nokia fastmile 5g gateway 31 unlock