The Advan S4Z Plus is a compact 4-inch 4G LTE smartphone from 2017, designed as an affordable entry into the world of fast mobile data. It is powered by a Spreadtrum SC9832 processor and runs on Android 6.0 Marshmallow. This guide provides the official stock firmware package to restore your device to its original factory software.
This firmware comes in the .cpb format, which requires a specific flashing utility called the YGDP (or QGDP) Tool. This process is the most effective solution for fixing critical software issues such as a completely dead phone (mati total), a device stuck on the Advan boot logo, or other system errors.
⚠️ Critical Warning: Data Erasure
Flashing this firmware is a complete reinstallation of the operating system. This process will permanently erase all of your personal information from the phone, including:
- Photos, Videos, and Music
- Contacts and Call History
- SMS and App Messages
- All Installed Applications
Please back up your important files before proceeding. This action cannot be undone.
Quick Device Specs
- Device: Advan S4Z Plus
- Release year: 2017
- Chipset: Spreadtrum SC9832
- Display: 4.0″ TN, 480 x 800 pixels
- RAM/Storage: 1GB/8GB
- Battery: 1500 mAh
- Original OS: Android 6.0 (Marshmallow)
Required Downloads
To flash this .cpb firmware, you will need the YGDP Tool and the official Spreadtrum/UNISOC USB drivers. These drivers are essential for your computer to correctly recognize the phone in flashing mode.
- The firmware package from the table below
- YGDP Tool (also known as QGDP Tool)
- Spreadtrum/UNISOC SCI USB Drivers
Official Stock Firmware (ROM)
| Build Version | Android Version | Type | Download |
|---|---|---|---|
| 170802 | 6.0 Marshmallow | Stock ROM (.cpb File) | Download |
How to Flash Stock Firmware
To restore your Advan S4Z Plus, you must use the YGDP Tool. First, install the UNISOC/Spreadtrum drivers on your PC. Open the YGDP Tool, enter the password (e.g., ‘9527’ or ‘369’), and use the “Config” menu to load the .cpb firmware file. Click “Start” on the main screen. Power off your phone completely. Press and hold the Volume Down key while connecting the phone to your PC with a USB cable to begin the flashing process.
For a complete, step-by-step walkthrough of this flashing method, please refer to our detailed pillar guide: How to Use YGDP Tool to Flash CPB Firmware.
Device-Specific Troubleshooting for Advan S4Z Plus
- For S4Z “Plus” Model Only: This firmware is specifically for the Advan S4Z Plus. It may not be compatible with the regular (non-Plus) Advan S4Z. Flashing the wrong firmware on a different model variant can cause it to brick.
- YGDP Tool Does Not Detect Phone: This is a driver issue. Ensure the UNISOC SCI drivers are installed correctly. Open the Windows Device Manager before connecting your phone; when you connect it in flash mode, a “Spreadtrum” or “SCI” device should appear briefly under the “Ports (COM & LPT)” section.
- “Invalid CPB File” Error: This error in the YGDP tool means your downloaded firmware file is incomplete or corrupted. Download the file again and ensure you are loading the
.cpbfile, not the.ziparchive. - YGDP Tool Password: The flashing tool is password-protected. The most common default passwords are 9527 or 369. You will need to enter one of these to log in and use the tool.
FAQs
- Q1. My Advan S4Z Plus is completely dead (mati total). Will this firmware fix it?
- Yes. If the cause of the dead device is corrupted software (a “hard brick”), then flashing this official
.cpbfirmware is the standard procedure to unbrick it and restore it to working condition. - Q2. What is a
.cpbfile and why can’t I use the normal SPD Upgrade Tool? - A
.cpbfile is a different type of firmware package used by some manufacturers. It requires the YGDP Tool for installation and is not compatible with the standard SPD Upgrade Tool which uses.pacfiles. - Q3. Will this process remove the Google Account (FRP) lock?
- No. Flashing the stock firmware will restore the original operating system, but it does not bypass Factory Reset Protection (FRP). You will still need to enter the credentials of the last Google account that was synced to the device.
- Q4. The tool gives an error and fails to flash. What should I do?
- First, confirm your drivers are installed correctly. Second, use a high-quality USB cable and a main USB port on your computer (not a hub). Third, ensure the phone’s battery has a sufficient charge before starting the process.
