Most ZTE routers allow 3–5 attempts. Exceed that, and the router will permanently lock, requiring a full firmware reflash. This is why using the best tool (accurate generation) is critical.
: Place a SIM card from a different carrier into the router. zte router network unlock tool best
DC-Unlocker remains the industry standard for data card and router unlocking. It supports a vast range of ZTE models and is highly recommended for its automated process. Most ZTE routers allow 3–5 attempts