hole on the back/bottom for 5 seconds until the indicators flash. Check Current Version

: Locate the 15-digit IMEI number on the label at the bottom of the router or by logging into the admin panel (usually at 192.168.8.1 ) under Device Information .

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After reboot, log into the router. The default IP may change to 192.168.0.1 (common for unlocked firmware). Default credentials:

: The most reliable method is obtaining a unique unlock code tied to the device's IMEI. Find the IMEI on the bottom label of the router.

Your router might be (refusing any SIM card outside the original carrier). It might hide advanced settings like band locking (forcing a specific 4G frequency). Or, its firmware could be bloated with carrier-specific bloatware that cripples performance.