ZTE Maven 3 (Z835) Firmware Flash File Download [Stock Rom]
The ZTE Maven 3 (model Z835) is a basic, entry-level smartphone that was sold by AT&T Prepaid in the USA. For users of this device, flashing the official stock firmware is the definitive solution for fixing critical software errors, especially the common “dm-verity” corruption error, resolving bootloops, and restoring the phone to its original factory state.
Important Note: This device is powered by a Qualcomm Snapdragon 210 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
- ZTE Maven 3 (Z835)
- Release year
- 2017
- Chipset
- Qualcomm Snapdragon 210
- Display
- 5.0″ FWVGA TFT (854×480)
- Battery
- 2070 mAh (Removable)
- Memory
- 1GB RAM + 8GB storage
- OS
- Android 7.1.1 (Nougat)
- Carrier
- AT&T Prepaid (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 |
|---|---|---|---|---|---|
| V1.0.0B13 | 7.1.1 (Nougat) | AT&T Prepaid (USA) | QFIL / QPST | Download | ~1.3 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 Maven 3 (remove and re-insert the battery) 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. My phone is stuck on the AT&T logo with a “dm-verity verification failed” error. Will this fix it?
Yes, absolutely. The “dm-verity” error means the system partition is corrupt, a very common issue on this model. Flashing this full stock firmware with QFIL is the standard and most effective way to rewrite the system and resolve this specific error.
Q2. Will this firmware remove the AT&T network lock?
No. This is the official AT&T stock firmware. It will restore the original software but will not remove the SIM lock. The device will remain locked to the AT&T network.
Q3. Why can’t I install many apps after flashing?
The ZTE Maven 3 has only 8GB of internal storage, most of which is used by the operating system. This firmware restores the phone to its original state, but you must use a microSD card for all photos and media, and be extremely selective about which apps you install to avoid running out of space.
Device-Specific Troubleshooting
- Unresponsive Touchscreen: If the touchscreen is occasionally unresponsive, a full firmware flash can resolve software or driver-related glitches. After flashing, if the problem persists, it may be a sign of a failing digitizer, which is a hardware issue.
- Overheating During Normal Use: A clean firmware flash can help reduce overheating by removing rogue software processes. However, due to the phone’s budget hardware, it may still get warm during tasks like browsing or using GPS. To manage heat, close unused background apps and avoid using the phone while it is charging.
- Stuck on AT&T Logo (Bootloop): A bootloop is the most common reason to flash this firmware. After the QFIL flash completes successfully, be patient as the first boot can take 10-15 minutes. If it’s still stuck, boot into recovery mode (hold Volume Up + Power) and perform a “Wipe data/factory reset”.
- 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). The removable battery helps: remove it, enter EDL mode, then connect the phone.
