ZTE Nubia Z11 Max (NX523J) Firmware Flash File Download [Stock Rom]
The Nubia Z11 Max (model NX523J) is a large-screen “phablet” from 2016, known for its vibrant 6.0-inch Super AMOLED display and a large 4000 mAh battery, making it a great device for media consumption. For users needing to unbrick a non-responsive device, resolve persistent software bugs like notification delays, or perform a full factory restore, flashing the official stock firmware is the most reliable solution.
Important Note: This device is powered by a Qualcomm Snapdragon 652 chipset. The restoration process requires the use of the QFIL (Qualcomm Flash Image Loader) tool and booting the device into EDL Mode.
Quick Device Specs
- Device
- Nubia Z11 Max (NX523J)
- Release year
- 2016
- Chipset
- Qualcomm Snapdragon 652
- Display
- 6.0″ FHD Super AMOLED (1920×1080)
- Battery
- 4000 mAh (Non-removable)
- Memory
- 4GB RAM + 64GB storage
- Camera
- 16MP (Sony IMX298) rear, 8MP front
- OS
- Android 5.1.1 (Lollipop), upgradable to 6.0.1 (Marshmallow)
Required Downloads
| File / Tool | Download Link |
|---|---|
| QPST (QFIL) Tool | Download QPST Tool |
| Qualcomm USB Drivers | Download Drivers |
Stock ROM & Firmware
| Version | Android | Region | Type | Download | Size |
|---|---|---|---|---|---|
| (2017-04-16) | 5.1 / 6.0 | Global/China | QFIL / QPST | Download | ~1.5 GB |
Quick Flashing Guide
- Download and install the Qualcomm USB Drivers and the QPST Tool on your PC.
- Extract the downloaded firmware ZIP file to a folder on your computer.
- Power off your Nubia Z11 Max and boot it into EDL Mode by holding the Volume Up + Volume Down buttons while connecting it to the PC via USB cable.
- Launch QFIL, load the firmware files (`prog_…mbn` and `rawprogram/patch` XMLs), and click the “Download” button to begin flashing.
For a complete, step-by-step tutorial with screenshots, please refer to our definitive guide:
How to Flash Firmware on Qualcomm Smartphones with QFIL
FAQs
Q1. Is this firmware for the regular Nubia Z11 or Z11 Mini?
No. This firmware is strictly for the large-screen Z11 Max (NX523J). The flagship Z11 (5.5-inch) and the Z11 Mini (5.0-inch) are different devices with different hardware. Using the wrong firmware will permanently brick your phone.
Q2. Why am I not getting WhatsApp notifications until I open the app?
This is a well-known issue with Nubia UI’s aggressive battery management. A clean firmware flash can help, but you must manually configure the power-saving settings. After flashing, go to `Settings > Battery > Power management` and find the section for background apps. You must manually exclude your important messaging apps (WhatsApp, Gmail, etc.) from any optimization or “kill” list.
Q3. My phone is stuck in a bootloop. Is this the right solution?
Yes. For a device stuck on the Nubia logo, a full firmware flash using the QFIL method is the standard and most effective way to recover it. This will erase all data and reinstall the entire operating system.
Device-Specific Troubleshooting
-
- Overheating, Especially During Gaming or Video Playback: The Snapdragon 652 chipset can run warm. A clean firmware flash removes rogue software that could cause extra processor load. To help manage heat, reduce screen brightness and avoid using the phone for intensive tasks while it is charging.
- Inconsistent Battery Life: A clean flash of the stock firmware is the best way to solve software-related battery drain. It removes buggy apps and processes. After flashing, let the phone run through a few full charge-discharge cycles to help the system recalibrate the battery statistics. Also, use the power management settings to control background apps.
- “System UI has stopped” or Frequent Freezing: This indicates a corrupted operating system. Flashing the stock ROM using the QFIL guide is the most reliable way to fix this. The process will wipe all data but installs a fresh, stable copy of Android.
- QFIL Fails with a “Sahara/Firehose” Error: This classic QFIL error points to a communication failure, usually caused by a driver problem. Reinstall the Qualcomm 9008 drivers (disabling driver signature enforcement in Windows first), use a high-quality USB cable, and ensure the phone is fully powered off before entering EDL mode.
