The ZTE Avid 579 (model Z5156CC) is a budget-friendly smartphone offered by carriers like Visible in the United States. It’s designed to provide a reliable Android experience for essential tasks, powered by the quad-core MediaTek Helio A22 (MT6761) processor and featuring a compact 5.45-inch display. This guide provides the official stock ROM for the US variant, which is essential for unbricking the device, fixing software bugs, removing a Google FRP lock, or resolving bootloop issues by restoring the phone to its factory condition.
Important: This firmware is specifically for the ZTE Avid 579 (Z5156CC). As a MediaTek device, it requires the SP Flash Tool for flashing. Flashing this on a different model will cause a hard brick.
Quick Device Specs
- Device: ZTE Avid 579 (Z5156CC)
- Release year: 2020
- Chipset: MediaTek Helio A22 (MT6761)
- Display: 5.45″ IPS LCD, HD+
- Battery: 2660 mAh
- Original OS: Android 10
Required Downloads
As a MediaTek device, this phone requires specific tools for flashing.
| File / Tool | Download Link |
|---|---|
| SP Flash Tool | Download Latest Version |
| MediaTek VCOM USB Drivers | Download Drivers |
Stock ROM (Firmware)
| Region / Carrier | Build | Android | Type | Download | Chipset |
|---|---|---|---|---|---|
| USA (Visible) | V1.0.0B13 | 10 | SP Flash Tool Firmware | Download | MediaTek |
How to Flash (SP Flash Tool)
This method is for restoring the official stock firmware and will erase all data.
- Install Drivers: Download and extract the MediaTek VCOM drivers. Run the installer. You may need to disable Driver Signature Enforcement in Windows for the drivers to install correctly.
- Extract Tools & Firmware: Extract the SP Flash Tool and the downloaded firmware .zip file into separate folders on your desktop.
- Launch the Tool: Open the SP Flash Tool folder and run flash_tool.exe as an administrator.
- Load Scatter File: In the “Download” tab, click the “Scatter-loading File” button. Navigate to the extracted firmware folder and select the MT6761_Android_scatter.txt file.
- Select Mode: Ensure the dropdown menu is set to Download Only.
- Start Flashing: Power off your phone completely. Click the green Download button in SP Flash Tool, then immediately connect your powered-off phone to the PC with a USB cable.
- Finish: The process will take several minutes. Once a green checkmark appears, the flash is complete. You can disconnect your phone and power it on. The first boot will take longer than usual.
Device-Specific Troubleshooting for ZTE Avid 579
- Correct Driver Installation: The most common failure point is incorrect drivers. You must install the MediaTek VCOM drivers. On modern Windows, this often requires disabling ‘Driver Signature Enforcement’ first. Your PC should recognize the phone as a ‘MediaTek PreLoader USB VCOM Port’ when connected correctly for flashing.
- Using the “Boot Key”: To get the tool to recognize your phone, you must use the boot key. Power the phone off completely. Press and hold the Volume Down button, and while holding it, connect the phone to your PC with the USB cable. Release the button only after the flash process begins.
- Fixing Google FRP Lock: If you are locked out of your phone after a factory reset due to Google’s Factory Reset Protection (FRP), flashing this stock ROM is a common method to remove the lock. The standard flashing process will completely reset the device and the locked account.
- Safer Flashing (Uncheck Preloader): For a safer flashing process that is less likely to cause a hard brick, it is often recommended to uncheck the preloader partition in SP Flash Tool before clicking Download. A wrong preloader is the most common cause of a dead phone. Only flash the preloader if the phone is already bricked and won’t turn on.
FAQs
Q1. What is a “scatter file”? The scatter file (e.g., MT6761_Android_scatter.txt) is a crucial map for MediaTek firmware. It tells SP Flash Tool the name, size, and location of every partition on the device’s storage, ensuring each part of the software is flashed to the correct place.
Q2. Will this unlock my phone from the Visible network? No. Flashing the official carrier firmware will restore the phone’s software, but it will not remove the SIM/network lock. The device will still be locked to the Visible network.
Q3. Will this process erase my data? Yes. Flashing the stock ROM with SP Flash Tool will perform a full factory reset and completely wipe all personal data, apps, and settings from your device.
