ZTE Gabb Z2 (Z5157Y) Firmware Flash File Download [Stock Rom]
ZTE Gabb Z2 (model Z5157Y) is a specialized smartphone designed for the Gabb Wireless service, featuring parental controls and limited functionality for children’s safety. If your device is experiencing software issues, connectivity problems, or needs restoration to its original factory state, flashing the correct stock firmware can help. This page provides the official stock ROM for the ZTE Gabb Z2.
Important Note: The ZTE Gabb Z2 uses a MediaTek MT6761 chipset and is specifically designed for Gabb Wireless’s restricted service. Flashing this firmware will restore the device to its original carrier-locked state with parental controls.
Quick Device Specs
- Device: ZTE Gabb Z2 (Z5157Y)
- Release year: 2022
- Chipset: MediaTek Helio A22 (MT6761)
- Display: 5.45″ IPS LCD, 960×480 (18:9)
- Battery: 2500 mAh (Removable)
- Memory: 2GB RAM + 16GB storage
- Camera: 5MP rear, 2MP front camera
- Special Feature: Parental controls, restricted app access
- Original OS: Android 10 (Go edition)
- Carrier: Gabb Wireless exclusive
Required Downloads
| File / Tool | Download Link |
|---|---|
| SP Flash Tool | Download SP Flash Tool |
| MediaTek USB Drivers | Download Drivers |
Stock ROM & Firmware
| Version | Build Number | Android | Carrier | Download | Size |
|---|---|---|---|---|---|
| 1.0.0B05 | Z5157YV1.0.0B05 | 10 (Go Edition) | Gabb Wireless | Download | ~1.9 GB |
How to Flash Using SP Flash Tool
- Install MediaTek USB Drivers: Extract and install the MediaTek drivers. Disable driver signature enforcement on Windows if needed.
- Extract the Firmware: Extract the downloaded ZIP file to get the ROM files including scatter.txt.
- Open SP Flash Tool: Load the scatter.txt file from the extracted folder.
- Select Download Mode: Choose “Download Only” or “Firmware Upgrade”.
- Power off your device completely. Click “Download” then connect your phone via USB.
- Wait for flashing to complete (green circle indicator). Disconnect and power on.
FAQs
Q1. What makes the Gabb Z2 different from regular smartphones?
The Gabb Z2 is specifically designed for children’s safety with:
- No internet browser or social media access
- Pre-approved contacts only for calling/texting
- No app store or ability to install apps
- GPS location tracking for parents
- Limited functionality focused on safety rather than features
Q2. Can I unlock the Gabb Z2 to use with other carriers?
The Gabb Z2 has several locking mechanisms:
- Hardware locked to Gabb Wireless network
- Software restrictions at firmware level
- Parental controls integrated into OS
- Limited settings access prevents modification
Even with flashing, the device remains carrier-locked to Gabb Wireless.
Q3. Why does this device use Android 10 Go edition?
Android 10 Go edition provides:
- Better performance on limited hardware
- Enhanced parental controls and restrictions
- Improved battery life for extended usage
- Security features appropriate for children’s device
- Cost effectiveness for budget-conscious manufacturing
Q4. What are the main limitations of the MediaTek MT6761?
The Helio A22 (MT6761) is an entry-level processor with:
- Basic performance for essential functions only
- Limited multitasking capability with 2GB RAM
- Basic camera processing for simple photos
- 4G LTE connectivity but no 5G support
- Adequate power for intended limited functionality
Troubleshooting (Gabb Z2)
- “Invalid SIM” after flashing: The Gabb Z2 is permanently carrier-locked to Gabb Wireless. No firmware flash will change this hardware restriction.
- Parental controls not functioning: The parental controls are integrated into the firmware. Flashing this stock ROM will restore all original restrictions and Gabb-specific features.
- SP Flash Tool not detecting device: Ensure you’re using the correct MediaTek USB drivers for the MT6761 chipset. Try different USB cables and ports.
- IMEI issues after flashing: The device may lose IMEI information. You may need to restore it using MediaTek-specific tools if you have backup.
- Limited functionality expected: Remember this device is designed with intentional limitations. “Normal” smartphone features are restricted by design.
- Gabb service activation required: After flashing, the device will require activation through Gabb Wireless service to function properly.
