No. Code-based unlocking permanently alters the carrier block bit on the modem hardware configuration layer. Future firmware updates will not re-lock your device.

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ZTE uses advanced cryptographic security structures on its newer LTE and 5G USB dongles. While older generation modems relied on basic 8-digit algorithmic calculations (like the NCK algorithm), modern high-quality firmware implements a robust 16-digit network lock code system.

Higher-quality calculators are distinguished by their support for various ZTE chipsets, such as the ZX297520V3

Place a SIM card from a different carrier into the dongle. Connect to PC: Plug the dongle into your USB port.

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Now you have the knowledge – go ahead and to enjoy the freedom of any mobile network anywhere in the world.

Once you have acquired your 16-digit code, follow these steps:

When you insert a SIM card from a different carrier into a locked ZTE modem, the device usually prompts for an "Unlock Code" or "NCK Code." This code is not random; it is derived from the device’s unique (International Mobile Equipment Identity).

These calculators utilize the unique identifier of your modem—the —to mathematically determine the correct unlock key. Because every modem has a unique IMEI, the generated 16-digit code is specific to your device alone.