Hi, here is the latest firmware of ZTE Nubia Z17miniS 5.2 Inch 4G LTE Smartphone.
Download here: ZTE Nubia Z17miniS 5.2 Inch 4G LTE Smartphone.
P.S. The following are the steps to flash the smartphone.
1. Press the power button and volume to enter the fastboot mode while the phone is in the power-off status. Enter the fastboot mode and then press the volume down button (if you do not press it, it will restart automatically after 10 seconds).
2. After the phone to be flashed enters the mode and connects the data cable, open the multi-brush_volume down button + power button.bat.
3. After finish flashing, it will restart automatically. Power off the phone after restarting.