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Do not turn off the router or disconnect the cable during this process. The device will restart once the new firmware is applied.

If the router behaves strangely after the update, use a pin to press the physical Reset button on the back for 10 seconds to restore factory defaults (under the new firmware). unlockzlts25bin exclusive

Use the best local data deals from any provider. Do not turn off the router or disconnect

Disclaimer: Flashing firmware can "brick" your device if done incorrectly. Proceed at your own risk. Use the best local data deals from any provider

Unlocked routers are more desirable in the secondhand market.

For those looking for a plug-and-play solution, some retailers sell pre-unlocked versions of the Airtel ZLT S25 Smartbox that are ready for any SIM card out of the box.

Unlocking a router (often referred to by its firmware file convention "unlockzlts25bin" ) is a popular way to break free from network locks—usually from providers like Airtel—allowing you to use SIM cards from any carrier like MTN, GLO, or 9Mobile.