Alternatively, you can try entering one of these sequences without a SIM card: ###825*09# *983*8284# to trigger the unlock window. Important Considerations Official Unlocking : Many service providers like SFR France

: Power off the device and insert a SIM card from a different network provider.

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 .