ZTE Avid Trio (Z833) Firmware Flash File Download [Stock Rom]
The ZTE Avid Trio (model Z833) is an entry-level smartphone from 2016, primarily offered by US carriers such as T-Mobile and MetroPCS. For users of this older device, flashing the official stock firmware is the best way to resolve software issues like being stuck on the carrier logo, fixing persistent errors, or unbricking a phone that will no longer boot.
Important Note: This device is powered by a Qualcomm Snapdragon 210 chipset. The restoration process requires flashing the firmware using the QFIL tool while the device is in EDL Mode. This firmware will restore the original T-Mobile/MetroPCS software, including all original apps and the network lock.
Quick Device Specs
- Device
- ZTE Avid Trio (Z833)
- Release year
- 2016
- Chipset
- Qualcomm MSM8909 Snapdragon 210
- Display
- 5.0″ FWVGA TFT (854×480)
- Battery
- 2800 mAh (Removable)
- Memory
- 1GB RAM + 8GB storage
- Camera
- 5MP rear, 2MP front
- OS
- Android 6.0 (Marshmallow)
- Carriers
- T-Mobile, MetroPCS (USA)
Required Downloads
File / Tool | Download Link |
---|---|
QPST (QFIL) Tool | Download QPST Tool |
Qualcomm USB Drivers | Download Drivers |
Stock ROM & Firmware
Version | Android | Carrier | Type | Download | Size |
---|---|---|---|---|---|
V1.0.0B06 | 6.0 (Marshmallow) | T-Mobile / MetroPCS | QPST | Download | ~1.2 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 ZTE Avid Trio, remove and re-insert the battery to be sure. 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. Will this firmware remove the T-Mobile or MetroPCS network lock?
No. This is official carrier stock firmware. It will restore the phone’s original software but will not remove or alter the SIM lock. The device will remain locked to the T-Mobile network.
Q2. The phone has very low RAM and storage. Is it still usable?
The 1GB of RAM and 8GB of internal storage are extremely limited for modern applications. After a clean flash, the phone will be restored to its original performance, but it is only suitable for very basic tasks like calling and SMS. A microSD card is essential for any media storage.
Q3. What is EDL Mode?
EDL (Emergency Download) Mode is a special recovery mode for Qualcomm devices. It allows QFIL to bypass a corrupted operating system and flash the firmware directly to the phone’s storage, making it essential for unbricking a device that won’t turn on.
Q4. How does the removable battery help with flashing?
Removing and re-inserting the battery is a foolproof way to ensure the device is completely powered off before you attempt to enter EDL mode, which can help prevent connection issues with the PC.
Troubleshooting (ZTE Avid Trio)
- QFIL shows “No Port Available” or gives a “Sahara” error: This is the most common flashing issue and is almost always caused by a driver problem. Reinstall the Qualcomm 9008 drivers, check Windows Device Manager to ensure the device is recognized, and use a high-quality USB cable.
- “Invalid SIM” error: This message is expected if you insert a SIM card from a carrier other than T-Mobile or its MVNOs. The phone is network-locked.
- Device is stuck on the T-Mobile/MetroPCS logo after flashing: The first boot after a full flash can take a long time (10-15 minutes). If it remains stuck, boot into recovery mode (hold Volume Up + Power from off) and perform a “Wipe data/factory reset”.
- Flashing succeeds but the phone still bootloops: If a clean flash followed by a factory reset does not resolve the issue, it may indicate a hardware problem on the aging device, such as a failing eMMC (the internal storage chip).