If the phone does not automatically prompt for a code, you may need to use a manual dialer sequence: Dial ###825*09# and then enter the unlock code. Sequence 2: Dial *983*8284# to open the unlock code window. Zte Sfr 101 Unlock Code Calculator - Facebook

Turn off the device and insert a SIM card from a different network. Power the device back on.

Carefully enter the NCK code provided by the calculator or service.

In the world of mobile telecommunications, carrier locking is a common practice designed to ensure that subsidized devices remain on a specific network for a contracted period. The ZTE SFR 101—a basic, often low-cost feature phone or smartphone distributed by the French carrier SFR (Société Française du Radiotéléphone)—is one such device. Users seeking to liberate their phones for use on other networks occasionally encounter references to an “unlock code calculator” or “unlock code generator” for this model. This essay examines what such a tool purports to do, how unlock codes generally work, the technical feasibility of calculating them, and the legal and practical alternatives available.

: Be careful; most ZTE phones only allow a limited number of attempts (usually 5 or 10) to enter the unlock code before the phone permanently locks to the original network.