If you are locked out of the device itself (forgotten PIN/Pattern) rather than the network: Hard Reset : Power off the phone, then hold Volume Up + Power simultaneously to enter Recovery Mode. Select "Wipe data/factory reset" (this erases all data). Dialer Codes
However, SFR and ZTE updated their security around 2014–2016. The models shipped with rolling code algorithms that are unique per IMEI batch. In plain English: A single “full” calculator that works for every SFR 101 does not exist publicly. zte sfr 101 unlock code calculator full
Once you have the 8-digit or 16-digit unlock code, follow these steps to apply it: ZTE Unlocking Troubleshooting Guide - doctorSIM If you are locked out of the device
While there is no single academic "paper" dedicated solely to a ZTE SFR 101 The models shipped with rolling code algorithms that
You can unlock your phone from home without sending it to a repair shop.