Advan G3 Pro Firmware Flash File Download [Stock Rom]

The Advan G3 Pro is a 6.3-inch smartphone released in late 2019, which stood out in the budget segment for its large HD+ display and dual stereo speakers tuned by Harman Kardon. It is powered by the UNISOC SC9863A octa-core processor and runs on Android 9.0 Pie. This guide provides the official stock firmware package to perform a full software restoration on your device.

This is a complete firmware package in the .pac format, designed to be flashed using the SPD (Spreadtrum) Upgrade Tool. It is the most reliable solution for fixing critical software issues such as a completely dead phone (mati total), a device stuck on the Advan boot logo, or software-related audio problems.

Disclaimer: Flashing this stock ROM 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 G3 Pro
• Release year: 2019
• Chipset: UNISOC SC9863A
• Display: 6.3″ IPS LCD, 720 x 1520 pixels
• RAM/Storage: 4GB/64GB
• Battery: 3500 mAh
• Original OS: Android 9.0 (Pie)

Required Downloads

To flash this .pac firmware file, you will need the SPD Upgrade Tool and the official Spreadtrum/UNISOC SCI USB drivers. You can find secure download links for both of these essential tools in our main guide, which is linked in the how-to section below.

• The firmware package from the table below
• SPD Upgrade Tool
• Spreadtrum/UNISOC SCI USB Drivers

Official Stock Firmware (ROM)

How to Flash Stock Firmware

To restore your Advan G3 Pro, you will use the SPD Upgrade Tool on a Windows PC. First, ensure you have correctly installed the UNISOC SCI USB drivers. Launch the tool, click the single gear icon (“Load Packet”), and select the .pac firmware file. Click the play icon (“Start Downloading”). Power off your phone completely. Finally, press and hold the Volume Down button while connecting the phone to your computer with a USB cable to initiate the flashing process.

For a complete, step-by-step walkthrough, driver downloads, and troubleshooting, please refer to our detailed pillar guide: How to Flash Firmware with SPD Upgrade Tool.

Device-Specific Troubleshooting for Advan G3 Pro

• Tool is Stuck on “Checking Baudrate”: This is the most common error when flashing UNISOC/Spreadtrum devices and it indicates a driver issue. Uninstall and reinstall the UNISOC drivers, use a different USB port (a main one on the back of your PC is best), and try a different USB cable. Newer chipsets like the SC9863A may require the latest drivers.
• Fixing Speaker and Audio Issues: The stereo speakers were a major feature of the G3 Pro. If you are experiencing audio problems like distortion, low volume from one speaker, or no sound at all, a full firmware flash is the best first step. It restores the original audio drivers and system sound profiles, which can resolve any software-related audio glitches.
• Entering Flash Mode: To start the process, you must hold a boot key. For the Advan G3 Pro, this is typically Volume Down. If that doesn’t work, try holding Volume Up while connecting the powered-off phone.
• “Failed: NV data backup” Error: If the flash fails with an NV data error, it’s having trouble with the partition that stores your IMEI. As an advanced fix, you can go into the tool’s settings (double gear icon) and uncheck all “NV_” partitions before flashing. Warning: This will erase your IMEI number, which you will then need to restore using a separate tool. Only attempt this if a standard flash fails.

FAQs

Q1. My Advan G3 Pro 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 .pac firmware is the standard procedure to unbrick it and restore it to working condition.

Q2. What is a .pac file?

A .pac file is an all-in-one firmware package for devices with UNISOC (formerly Spreadtrum) chipsets. It bundles all system partitions (boot, recovery, system, etc.) into a single file for easy flashing.

Q3. The flash tool doesn’t detect my phone. What’s wrong?

This is a driver issue 99% of the time. Ensure the UNISOC SCI drivers are installed correctly. Open the Windows Device Manager before connecting your phone; when you connect it while holding Volume Down, a “Spreadtrum” or “SCI” device should appear briefly.

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.