Q1. My Nubia M2 is stuck in a bootloop. Which method should I use?

If you can still access recovery mode, try the "Local Update" method first, as it's simpler. If recovery is inaccessible or the update fails, the fastboot method is the more powerful option for restoring the device, as it re-flashes all critical partitions directly.

Q2. Can I switch from the India firmware to the International version?

Yes, since these are official packages for the same model (NX551J), you can generally cross-flash between regions (e.g., from India v1.11 to International v1.10) using either the local update or fastboot method to change your software channel. However, always back up your data as this will perform a clean install.

Q3. I have a custom recovery (like TWRP) installed. Can I still use the Local Update method?

No. The "Local Update" method requires the official stock recovery. If you have TWRP installed, you must first flash the stock recovery image using fastboot (fastboot flash recovery recovery.img) from a fastboot package or flash the entire stock ROM via the fastboot method, which will overwrite TWRP.

Download ZTE Nubia M2 (NX551J) Stock Firmware (All Regions) & Flashing Guide

The ZTE Nubia M2 (NX551J) is powered by the Qualcomm Snapdragon 625 (MSM8953) chipset and Adreno 506 GPU, a reliable mid-range combination that saw wide use. These official firmware packages, available in both local update and fastboot formats, can restore the device to its factory state, resolve software issues like bootloops or instability, and serve as a baseline for returning from custom ROMs like LineageOS.

Important Note: This device uses a Qualcomm Snapdragon 625 chipset. Flashing can be done via stock recovery for update.zip files or through fastboot for raw image packages. Always back up your data, as these processes will erase all personal information.

Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your files, photos, and contacts on the internal storage will be permanently deleted.
Charge The Battery: Ensure the phone’s battery has at least a 50% charge to prevent shutdowns during the update.
Required Hardware: You will need a Windows PC and a USB-C cable for fastboot flashing. For the local update method, a microSD card or USB-OTG drive is needed.
Install Drivers: For fastboot mode, install the ADB & Fastboot drivers on your PC.

ZTE Nubia M2 (NX551J) Firmware Details

Device Name: ZTE Nubia M2
Model: NX551J
Chipset: Qualcomm MSM8953 Snapdragon 625 (Octa-core 2.0 GHz Cortex-A53)
GPU: Adreno 506
Android Version: Based on Android 6.0.1 (Marshmallow), upgradable
Firmware Versions: v1.10, v1.11, v1.59 (and others)
File Types: ZIP archives for both stock recovery (update.zip) and fastboot flashing
Flashing Tools: Stock Recovery (for local updates) or PC with ADB/Fastboot commands
Battery: 3630 mAh (non-removable)

Required Tools & Downloads

File / Tool	Download Link
ADB & Fastboot Drivers	Download Drivers from Google

ZTE Nubia M2 (NX551J) Stock ROM / Firmware

Filename / Version	Region	Type	Size	Download
NX551J_Z69_EN_TSXPR17D11L111.zip (v1.11)	India	Local Update	1.8 GB	Google Drive
NX551J-1.59-FASTBOOT.zip (v1.59)	International	Fastboot	1.8 GB	AndroidFileHost
NX551J_Z69_EN_TSXPR17D11L110.zip (v1.10)	International	Local Update	1.8 GB	Yandex Disk
ZTE_Nubia_M2_NX551J_Z69_EN_TSXPR17D11L110_Spain.zip (v1.10)	Spain	Local Update	1.8 GB	AndroidFileHost
ZTE_Nubia_M2_NX551J_Z69_EN_TSXPR17D11L110_EU.zip (v1.10)	Europe	Local Update	1.8 GB	AndroidFileHost
ZTE_Nubia_M2_NX551J_Z69_EN_TSXPR17D11L110_Indonesia.zip (v1.10)	Indonesia	Local Update	1.8 GB	AndroidFileHost

Quick Flashing Guide (Two Methods)

Method 1: Local Update (Stock Recovery)

Download the desired Local Update firmware (e.g., NX551J_Z69_EN_TSXPR17D11L110.zip) and place the ZIP file in the root directory of a microSD card or USB-OTG drive.
Power off your Nubia M2 completely.
Press and hold the Volume Up + Power buttons simultaneously until you see the Nubia logo, then release to enter stock recovery mode.
Use the volume buttons to navigate to “Apply update from SD card” (or “from external storage”) and press the power button to select it.
Select the firmware ZIP file you downloaded. The installation will begin automatically. Once complete, reboot the device.

Method 2: Fastboot Flashing

Download and extract the fastboot firmware package (NX551J-1.59-FASTBOOT.zip) to a folder on your PC.
Install ADB & Fastboot drivers on your PC.
Power off your phone. Then, press and hold the Volume Down + Power buttons until the fastboot screen appears. Connect your phone to the PC.
Open a command prompt window in the folder where you extracted the fastboot files.
Run the flashing script included in the firmware package (often named flash_all.bat or similar), or manually flash each partition using fastboot commands (e.g., fastboot flash recovery recovery.img).

For a more detailed, step-by-step guide on Qualcomm flashing, please refer to our main tutorial:
Full Tutorial: How to Flash Qualcomm Firmware

Frequently Asked Questions (FAQs)

Q1. My Nubia M2 is stuck in a bootloop. Which method should I use?: If you can still access recovery mode, try the “Local Update” method first, as it’s simpler. If recovery is inaccessible or the update fails, the fastboot method is the more powerful option for restoring the device, as it re-flashes all critical partitions directly.
Q2. Can I switch from the India firmware to the International version?: Yes, since these are official packages for the same model (NX551J), you can generally cross-flash between regions (e.g., from India v1.11 to International v1.10) using either the local update or fastboot method to change your software channel. However, always back up your data as this will perform a clean install.
Q3. I have a custom recovery (like TWRP) installed. Can I still use the Local Update method?: No. The “Local Update” method requires the official stock recovery. If you have TWRP installed, you must first flash the stock recovery image using fastboot (fastboot flash recovery recovery.img) from a fastboot package or flash the entire stock ROM via the fastboot method, which will overwrite TWRP.