ZTE Nubia Z5S mini NX405H hard reset

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You can reset your ZTE device’s password after power on: input *983*987# in emergency dial-up pad. Select Erase everything. It will restore factory settings and your personal data will be erased.

Turn off your ZTE Nubia Z5S mini NX405H. Press Volume UP + POWER ON.ZTE Nubia Z5S mini NX405H hard reset from menu

Or if your phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset, click Reset phone and then Erase everything to format your phone.