Q1. Can I use this firmware on the Advan S6 Plus (5502) model?

No. The 5509 and 5502 are different hardware revisions. While their specifications appear similar, they may use different internal components (like display panels or camera sensors). Flashing the wrong firmware version can lead to hardware malfunctions or brick your device. You must match the firmware to the exact model number on your phone.

Q2. What is Android 8.1 (Go edition)?

Android Go is an official, lightweight version of Android from Google, designed for smartphones with 1.5GB of RAM or less. It uses less storage and includes optimized "Go" versions of popular apps to ensure a smoother experience on entry-level hardware like the Advan S6 Plus.

Q3. Why does this MediaTek phone use QGDP instead of SP Flash Tool?

For certain models, manufacturers package the official firmware in a compressed .cpb format. This file type is not compatible with the standard SP Flash Tool (which uses scatter files) and requires the specific factory software it was designed for, which is the QGDP tool.

Advan S6 Plus (5509) Stock Firmware (.cpb for QGDP)

The Advan S6 Plus (model 5509) is a budget 5.5-inch smartphone from the Indonesian brand Advan. It runs on Android 8.1 (Go edition), a lightweight operating system designed to provide a smooth experience on entry-level hardware with 1GB of RAM. If your Advan S6 Plus (5509) is bricked, stuck in a bootloop, or suffering from other software issues, flashing the official stock firmware is the most reliable way to restore it.

Important Note: This firmware is specifically for the Advan S6 Plus model 5509. Do not attempt to flash this on the similar-looking 5502 model. This firmware is in the `.cpb` format and requires the QGDP Assembly Tool. The process will erase all your personal data.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your files, photos, and contacts on the internal storage will be permanently deleted.
Charge The Battery: To prevent interruptions, ensure the phone’s battery has at least a 50% charge before you begin.
Windows PC & USB Cable: This procedure requires a Windows computer and the phone’s micro USB data cable.

📱 Quick Device Specifications

Device: Advan S6 Plus (5509)
Release Year: ~2019
Chipset: MediaTek MT6739WW
Display: 5.5″ FWVGA+ LCD (480×960)
Battery: 2450 mAh
OS: Android 8.1 Oreo (Go edition)
RAM/Storage: 1GB / 8GB

🛠 Required Tools & Downloads

File / Tool	Download Link
QGDP Assembly Tool	Download Tool
MediaTek USB VCOM Drivers	Download Drivers

⬇️ Advan S6 Plus (5509) Stock ROM / Firmware

Model	Android	Chipset	Type	Download	Size
S6 Plus (5509)	8.1 Oreo (Go edition)	MT6739WW	QGDP (.cpb File)	Google Drive	~1.0 GB

⚡ Quick Flashing Guide

Download and install the MediaTek VCOM drivers. Extract the firmware (Advan_S6_Plus_5509...QGDP.zip) to get the .cpb file, and extract the QGDP Tool.
Launch the QGDP Assembly Tool. If prompted for a password, enter 369 or 123456.
Click “Config” in the top left, select “Select CPB File,” and browse to the .cpb firmware file. Click “Apply.”
Click the large “Start” button to prepare the tool for flashing.
Power off your phone completely. Press and hold the Volume Down button, then connect the phone to your PC with the USB cable.
The tool will detect the device and begin the flashing process. Once the progress bar reaches 100% and turns green, disconnect and reboot the phone.

For a more detailed, step-by-step walkthrough of this process, please refer to our full guide:
👉 Full Tutorial: How to Flash .cpb Firmware with YGDP/QGDP Tool

❓ Frequently Asked Questions (FAQs)

Q1. Can I use this firmware on the Advan S6 Plus (5502) model?: No. The 5509 and 5502 are different hardware revisions. While their specifications appear similar, they may use different internal components (like display panels or camera sensors). Flashing the wrong firmware version can lead to hardware malfunctions or brick your device. You must match the firmware to the exact model number on your phone.
Q2. What is Android 8.1 (Go edition)?: Android Go is an official, lightweight version of Android from Google, designed for smartphones with 1.5GB of RAM or less. It uses less storage and includes optimized “Go” versions of popular apps to ensure a smoother experience on entry-level hardware like the Advan S6 Plus.
Q3. Why does this MediaTek phone use QGDP instead of SP Flash Tool?: For certain models, manufacturers package the official firmware in a compressed .cpb format. This file type is not compatible with the standard SP Flash Tool (which uses scatter files) and requires the specific factory software it was designed for, which is the QGDP tool.

🔧 Device-Specific Troubleshooting

QGDP Tool Fails to Detect the Phone: This is the most common issue and is almost always driver-related. First, reinstall the MediaTek VCOM drivers. Second, follow the connection sequence precisely: power off the phone, click “Start” in the tool, press and hold Volume Down, and only then connect the USB cable.
“Invalid CPB File” Error in QGDP: This error means the firmware file is either corrupted or not compatible with your version of the QGDP tool. Try to download the firmware file again. If the problem persists, you may need a different version of the QGDP tool.
Phone is Very Slow After Flashing: A clean firmware installation will restore the phone to its optimal performance. However, due to the hardware limitations (1GB RAM), the device is only intended for basic tasks. For the best experience, use the pre-installed “Go” applications and limit background apps.
Stuck on Advan Logo After a Successful Flash: If the tool shows 100% but the device won’t boot, a factory reset is necessary. Boot into recovery mode (usually by holding Power + Volume Up), and in the menu, select “wipe data/factory reset.” This will clear old data conflicts and allow the new system to boot.