The Nubia Z17S (model NX595J) is a design-forward flagship smartphone from 2017 that pushed the boundaries of screen-to-body ratio with its striking “bezel-less” visual experience. Powered by the flagship Qualcomm Snapdragon 835 processor, it offered top-tier performance and uniquely featured dual-camera systems on both the front and the back. For users who are not receiving automatic updates or who need to manually install a specific software version, this guide provides an official OTA (Over-The-Air) update package. This file allows you to update your device’s software using the stock recovery’s “Local update” feature or the more advanced ADB sideload method.
Important: This is an OTA update file, not a full unbrick package. It is designed for updating a functioning phone. Flashing the wrong firmware for your device’s region can cause the update to fail. This process will not wipe your data, but a backup is always recommended.
Quick Device Specs
- Device: Nubia Z17S (NX595J)
- Release year: 2017
- Chipset: Qualcomm Snapdragon 835
- Display: 5.73″ LTPS IPS LCD
- Battery: 3100 mAh, 26W fast charging
- Original OS: Android 7.1 (Nougat), Nubia UI 5.1
- Key Features: Dual 12MP+23MP Rear Cameras, Dual 5MP Front Cameras, Minimal Bezels
Required Downloads
For the advanced ADB Sideload method, you will need the official ADB tools from Google.
| File / Tool | Download Link |
|---|---|
| ADB & Fastboot Platform-Tools | Official Google Download Page |
| Nubia USB Drivers | Download Drivers |
Official OTA Update Package
| Region | Version | Type | Download | Model |
|---|---|---|---|---|
| International (EN) | V1.06 | Official OTA Zip | Download | NX595J |
How to Manually Install OTA Updates
There are two methods to install this update. The Local Update method is the easiest and recommended for most users.
Method 1: Local Update (Easiest Method)
- Download the OTA
.zipfile. Do not extract it. - Connect your phone to your PC and transfer the downloaded
.zipfile to the root directory of your phone’s internal storage (i.e., not inside any folders). - On your phone, navigate to Settings → System → System update.
- Tap the gear icon or menu icon in the top-right corner and select Local update or a similar option.
- Your phone will scan the storage and find the update package. Tap on it to begin the installation.
- The phone will verify the package and reboot to complete the update.
Method 2: ADB Sideload (Advanced Method)
- Download and set up the ADB Platform-Tools on your PC.
- Download the OTA
.zipfile and place it in the same folder as your ADB tools. Rename it to something simple, likeupdate.zip. - Reboot your Nubia Z17S into recovery mode (Power off, then hold Power + Volume Up).
- Using the volume keys, navigate to Apply update from ADB and select it with the power button.
- Connect your phone to the PC. In a command prompt window in the ADB folder, type
adb devicesto ensure it’s connected. - Type the command:
adb sideload update.zip - The update process will begin. Do not unplug the device until it is finished and the phone has rebooted.
Device-Specific Troubleshooting for Nubia Z17S OTA Updates
- “Update Verification Failed” Error: This is the most common error and it means you are using the wrong file. OTA packages are region-locked (e.g., Global vs. China) and version-specific. Ensure this package is meant for your exact model and that you are not trying to downgrade your software.
- This is NOT an Unbrick File: An OTA
.zipfile is for updating a working phone only. If your phone is hard-bricked (won’t turn on or boot into recovery), you need a different type of firmware (an EDL programmer/firehose file) and a different flashing method (QFIL). This file will not fix a dead device. - ADB “Device not found”: If your PC doesn’t see the phone in adb sideload mode, it’s a driver issue. Ensure you have the latest Nubia/ADB drivers installed and that your phone is recognized correctly in the Windows Device Manager. Try a different USB port and cable.
- Slow Software Updates: Nubia’s global software update schedule was often slower than its domestic Chinese one. Using manual OTA files like this one is a common way for users to get the latest security patches and features without waiting for the automatic rollout.
FAQs
Q1. What is an OTA file? Can I use it to unbrick my phone? An OTA (Over-The-Air) file is an update package designed to upgrade a working phone from one software version to another. It is not a full firmware package and cannot be used to unbrick a dead or unresponsive phone.
Q2. Do I need to unlock my bootloader to install this update? No. This is an official, signed OTA package. It can be installed on a device with a locked bootloader using either the Local Update or ADB Sideload method.
Q3. Will this erase my data? No, a standard OTA update does not wipe user data. However, it is always highly recommended to back up your important data before any major software installation.
Q4. What does the “EN” in the filename mean? “EN” typically denotes the English or International version of the firmware, as opposed to a “CN” version which would be specifically for the Mainland China market and would lack Google Play Services.
