The Advan S6 Plus (model 5509) is a specific variant of the 5.5-inch S6 Plus smartphone, released around 2019. This version is powered by the UNISOC SC9863A octa-core processor and runs on Android 8.1 Oreo (Go Edition), which is optimized for its 1GB of RAM. This guide provides the official stock firmware package to restore this particular model.
This firmware comes in the .cpb format and requires the YGDP (or QGDP) Tool for flashing. It is the correct solution for fixing major software issues such as a completely dead phone (mati total), a device stuck on the Advan boot logo, or other critical system errors specific to the 5509 model.
Disclaimer: Flashing this firmware will completely erase all data from your phone’s internal storage, including your apps, contacts, photos, and files. Please ensure you have backed up any important data before you begin.
Quick Device Specs
- Device: Advan S6 Plus (5509)
- Release year: 2019
- Chipset: UNISOC SC9863A
- Display: 5.5″ IPS LCD, 480 x 960 pixels
- RAM/Storage: 1GB/16GB
- Battery: 2450 mAh
- Original OS: Android 8.1 Oreo (Go Edition)
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 |
|---|---|---|---|
| 8.0.033.P1.190125 | 8.1 Oreo (Go Edition) | Stock ROM (.cpb File) | Download |
How to Flash Stock Firmware
To restore your Advan S6 Plus (5509), 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 S6 Plus (5509)
- CRITICAL – For Model 5509 ONLY: This firmware is exclusively for the Advan S6 Plus model 5509 which uses the UNISOC SC9863A chipset. It is NOT compatible with the model 5502, which uses a different chipset. Flashing the wrong firmware will brick your device. Always verify your model number if possible.
- 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.
- 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.
- Restoring Android Go Performance: The Advan S6 Plus (5509) runs the lightweight Android Go Edition. If the phone has become slow or unresponsive, a full firmware flash is the best way to restore its original performance by removing all software clutter and providing a clean installation of the OS.
FAQs
- Q1. What is the difference between the Advan S6 Plus 5509 and 5502?
- They are different hardware revisions that use different chipsets. The 5509 model (this firmware) uses a UNISOC SC9863A, while the 5502 uses an SC9850KA. Their firmware files are not interchangeable and will brick the wrong device.
- Q2. My Advan S6 Plus is dead (mati total). Will this firmware fix it?
- Yes, but only if you have the 5509 model. If you flash this and it fails, you may have the 5502 model, which requires a different firmware file and may use a different flashing tool.
- Q3. The flash tool asks for a password. What do I enter?
- The most common default passwords for the YGDP Tool are ‘9527’ and ‘369’. Try one of those to log in.
- Q4. 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.
