Entering the code once a "foreign" SIM card (from a different carrier) is inserted. 3. Free Online Calculators

Once you have obtained your 16-digit code, follow these steps to apply it: your ZTE device.

: The calculator uses specific ZTE algorithms to "calculate" what the factory unlock code should be for that specific IMEI.

: The tool provides the 16-digit sequence required to bypass the network lock. Methods to Get Your 16-Digit Code 1. Official Carrier Request (Free)