Q1. What is Android 8.1 (Go edition)?

Android Go is an official version of Android from Google, specifically optimized for low-end devices with 2GB of RAM or less. It uses less storage, consumes less memory, and includes lightweight "Go" versions of Google apps to provide a better user experience on budget hardware like the Advan i6A.

Q2. Can I use the normal SP Flash Tool to install this firmware?

No. Although this is a MediaTek device, the firmware is packaged in a compressed .cpb format. This format is incompatible with SP Flash Tool and can only be installed using the specific factory software it was designed for, which is the QGDP tool.

Q3. Will this firmware fix the Face ID unlock feature?

If the Face ID feature stopped working due to a software bug or corrupted data, a full firmware flash will restore the original software and should resolve the issue. If the problem persists after a clean flash, it could indicate a hardware issue with the front camera.

Advan i6A (5501) Stock Firmware (.cpb for QGDP)

The Advan i6A (model 5501) is a 5.5-inch budget smartphone from the Indonesian brand Advan, released around 2018. It runs on Android 8.1 (Go edition), an operating system optimized for smooth performance on devices with 2GB of RAM or less, and includes modern features like Face ID. If your Advan i6A is bricked, stuck in a bootloop, or has persistent software errors, flashing the official stock firmware is the definitive way to restore it to its original condition.

Important Note: This firmware is packaged in the `.cpb` format and must be installed using the QGDP Assembly Tool. This process is different from the more common SP Flash Tool and will completely erase all data on your device.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All personal data, including apps, photos, and files, will be permanently deleted from the phone’s storage.
Charge Your Phone: Ensure the battery is charged to at least 50% to prevent it from shutting down during the flashing process.
Windows PC & USB Cable: This procedure requires a Windows computer and the phone’s micro USB data cable.

📱 Quick Device Specifications

Device: Advan i6A (5501)
Release Year: ~2018
Chipset: MediaTek MT6739WW
Display: 5.5″ FWVGA+ LCD (480×960)
Battery: 2450 mAh
OS: Android 8.1 Oreo (Go edition)
RAM/Storage: 2GB / 16GB

🛠 Required Tools & Downloads

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

⬇️ Advan i6A (5501) Stock ROM / Firmware

Model	Android	Chipset	Type	Download	Size
i6A (5501)	8.1 Oreo (Go edition)	MT6739WW	QGDP (.cpb File)	MediaFire	~1.0 GB

⚡ Quick Flashing Guide

Download and install the MediaTek VCOM drivers. Extract the firmware (Advan_i6A_5501...CPB.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. What is Android 8.1 (Go edition)?: Android Go is an official version of Android from Google, specifically optimized for low-end devices with 2GB of RAM or less. It uses less storage, consumes less memory, and includes lightweight “Go” versions of Google apps to provide a better user experience on budget hardware like the Advan i6A.
Q2. Can I use the normal SP Flash Tool to install this firmware?: No. Although this is a MediaTek device, the firmware is packaged in a compressed .cpb format. This format is incompatible with SP Flash Tool and can only be installed using the specific factory software it was designed for, which is the QGDP tool.
Q3. Will this firmware fix the Face ID unlock feature?: If the Face ID feature stopped working due to a software bug or corrupted data, a full firmware flash will restore the original software and should resolve the issue. If the problem persists after a clean flash, it could indicate a hardware issue with the front camera.

🔧 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.
Invalid IMEI After Flashing: If your SIM card is not detected after flashing, your IMEI may have been erased. This can happen, but it’s less common with the QGDP process. If the IMEI is lost, it will need to be restored using a separate tool like Maui META.
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.