: For technical users, GitHub repositories like zte-imei-unlock
A 16-digit unlock code is a specific type of code required to unlock certain ZTE modem dongles. This code is usually generated by the unlock code calculator and is used to authenticate and authorize the device for use on other networks.
Octopus Suite (also called Octopus Box) includes a dedicated codes calculator for many ZTE devices, such as the ZTE SFR 114, ZTE SFR 231, ZTE ORANGE Vegas, ZTE X760, ZTE X990, and several others. It also supports direct unlocking for the ZTE MF100 (with a specific firmware version) and the ZTE MF190. zte modem dongle unlock code calculator -16 digit-
Coders discovered the algorithm involved mapping the first 15 IMEI digits, summing them, and performing Modulo 10 operations to generate each of the 16 digits.
While the exact algorithm varies among different ZTE modem families, the underlying principle remains similar: It also supports direct unlocking for the ZTE
Unlocking a modem may void the warranty with your carrier. It is recommended to check if your carrier provides the unlock code for free officially before using third-party calculator tools.
When you insert a SIM card from a different carrier into a locked dongle, the device will display a prompt asking for the unlock code. You then enter the 16‑digit number (usually via the ZTE connection manager software or the web admin interface), and the modem becomes permanently unlocked. It is recommended to check if your carrier
Once you obtain the correct 16-digit code via a provider or server, follow these steps to apply it: Power off your ZTE modem dongle.
ZTE’s older dongles (pre-2015) used a relatively simple XOR-based checksum algorithm. Newer 4G dongles use a more complex method truncated to 16 decimal digits. The process looks like this: