The Advan S4Q is a compact, 4-inch ultra-budget smartphone from 2015, designed for basic communication needs. It operates on a Spreadtrum SC7731G chipset and came with Android 4.4 KitKat. This guide provides the official stock firmware package to restore your device to its original factory condition.
This is a complete firmware package in the .pac format, which is used for flashing with 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 logo, or removing persistent viruses and malware.
Disclaimer: The flashing process will completely erase all data from your phone’s internal storage, including your contacts, messages, photos, and any installed apps. Please back up your data if possible before proceeding.
Quick Device Specs
- Device: Advan S4Q
- Release year: 2015
- Chipset: Spreadtrum SC7731G
- Display: 4.0″ TN, 480 x 800 pixels
- RAM/Storage: 512MB/4GB
- Battery: 1300 mAh
- Original OS: Android 4.4 (KitKat)
Required Downloads
To flash this .pac firmware file, you will need the SPD Upgrade Tool and the official Spreadtrum 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 SCI USB Drivers
Official Stock Firmware (ROM)
| Build Version | Android Version | Type | Download |
|---|---|---|---|
| V2.0_151120 | 4.4 KitKat | Stock ROM (.pac File) | Download |
How to Flash Stock Firmware
To restore your Advan S4Q, you will use the SPD Upgrade Tool on a Windows PC. First, ensure you have correctly installed the Spreadtrum 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 S4Q
- Removing Stubborn Viruses/Malware: Ultra-budget phones like the S4Q are often targets for malware that can install unwanted apps or show ads. If you are facing this, a full firmware flash is the only guaranteed way to completely remove the infection from the system partition.
- Tool Stuck at “Checking Baudrate”: This is the most common error and it signifies a driver or connection problem. Uninstall and reinstall the Spreadtrum drivers, use a different USB port (preferably a main one on the back of your PC), and try a different USB cable.
- Managing Extremely Low Storage: With only 4GB of internal storage and 512MB of RAM, the phone’s performance is very limited. A clean flash will clear out all junk and maximize free space. After flashing, avoid installing many applications and use lightweight “Go” edition apps where possible.
- Entering Flash Mode: The key to starting the process is to hold a boot key. For the Advan S4Q, this is typically Volume Down. If that doesn’t work, try holding Volume Up or both volume buttons together while connecting the powered-off phone.
FAQs
- Q1. My Advan S4Q is completely dead (mati total) and won’t turn on. Can this fix it?
- Yes. If the problem is due to corrupted software, flashing the official
.pacfirmware is the standard method for unbricking Spreadtrum-based devices and bringing them back to life. - Q2. What is a
.pacfile? - A
.pacfile is an all-in-one firmware package for devices with Spreadtrum (now UNISOC) 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 am I doing wrong?
- The problem is almost certainly the drivers. Ensure the Spreadtrum SCI drivers are installed correctly. Your PC should make a connection sound, and a “Spreadtrum” device should briefly appear in the Windows Device Manager when you connect the phone correctly.
- Q4. What version of Android is this firmware?
- This firmware package will restore your Advan S4Q to the stock Android 4.4 KitKat operating system.
