Unlocking removes the “SIM Lock” or “Network Lock.” Once unlocked, your ZTE SFR 101 will accept SIM cards from any GSM operator worldwide (compatible with 2G/GSM 900/1800 bands). You can then use Orange, Bouygues Telecom, Free Mobile, or any international carrier like Vodafone, T-Mobile, or O2.

We cannot link directly due to changing URLs, but search for:

Look for legacy pages that haven’t been updated since 2015 – those are often the correct ones. Alternatively, use offline calculators available in the "ZTE Mobile Unlock Tool" software bundle (older versions only).

Input your 15-digit IMEI. Click "Generate" or "Calculate." Within 1 second, the calculator should return an 8-digit numeric code (sometimes starting with a 0). Example: 23456789.

Once successfully unlocked, the code is not needed again. The phone remains unlocked even after factory resets.