This application generates a SIM unlock code for your ZTE Blade version B04 by IMEI. This way you will not void your warranty and you will be able to use your phone with a SIM card from any network operator.
Attention! Check the version of your ZTE Blade in Settings » About phone » Build number. The unlock code is only valid for the build "ZTE-BLADEV1.0.0B04".
For any other version of ZTE Blade / Orange San Francisco you can use my other application: https://play.google.com/store/apps/details?id=com.ngeeks.unlockb03