ZTE N9120 manual

2.Press volume key to choose apply update from external storage

3.The mobile phone searches for update.zip update package then press volume key to choose update.zip and touch power key to start upgrade, shown as picture 1-11.

Picture 1-11

4.The upgrade is finished after 1-2 minutes, when the mobile phone enters into the interface shown as picture1-10, please touch Power key to choose reboot system now, then the mobile phone automatically restarts.