The Advan S50A is a 5-inch budget smartphone from 2015, designed for essential communication and daily tasks. It is powered by a Spreadtrum SC7731 quad-core processor and runs on the Android 5.1 Lollipop operating system. This guide provides all available official stock firmware packages to perform a full software restoration on your device.
This is a complete firmware package in the .pac format, which is designed to be flashed using the SPD (Spreadtrum) Upgrade Tool. It is the best solution for fixing major software issues, such as a bricked or dead phone (mati total), a device that is stuck on the Advan logo (bootloop), or for removing stubborn malware.
Disclaimer: Flashing a stock ROM will completely erase all personal data from the phone’s internal storage, including your apps, photos, contacts, and files. Please ensure you have backed up any important data before you begin.
Quick Device Specs
- Device: Advan S50A
- Release year: 2015
- Chipset: Spreadtrum SC7731
- Display: 5.0″ IPS LCD, 480 x 854 pixels
- RAM/Storage: 1GB/8GB
- Battery: 2000 mAh
- Original OS: Android 5.1 (Lollipop)
Required Downloads
To flash this firmware, you will need the SPD Upgrade Tool and the correct Spreadtrum SCI USB drivers for your Windows PC. You can find up-to-date and secure download links for these utilities in our main guide, which is linked in the how-to section below.
- A firmware package from the table below
- SPD Upgrade Tool
- Spreadtrum SCI USB Drivers
Official Stock Firmware (ROM)
Below are multiple versions of the stock firmware for the Advan S50A. If you are unsure which to use, start with the latest build date. If it fails to flash or causes issues, try an older version as your device might be from an earlier production batch.
| Build Version / Date | Android Version | Type | Download |
|---|---|---|---|
| V1.1.6 (2015-12-14) | 5.1 Lollipop | Stock ROM (.pac File) | Download |
| V01 (2015-11-24) | 5.1 Lollipop | Stock ROM (.pac File) | Download |
| V1.1.4 (2015-06-06) | 5.1 Lollipop | Stock ROM (.pac File) | Download |
How to Flash Stock Firmware
To restore your Advan S50A’s software, you will use the SPD Upgrade Tool on a PC. First, ensure you have correctly installed the Spreadtrum SCI drivers. Launch the tool, click the “Load Packet” (gear) icon, and select the .pac firmware file. Click the “Start Downloading” (play) icon. Power off your phone completely. Press and hold the Volume Down button while connecting the phone to the computer to begin the flashing process.
For a complete, step-by-step walkthrough, please refer to our detailed pillar guide: How to Flash Firmware with SPD Upgrade Tool.
Device-Specific Troubleshooting for Advan S50A
- Which Firmware Version to Use?: It’s always best to start with the newest firmware build, which is V1.1.6 from December 2015. If that version fails to flash or causes issues like a non-working camera or touch screen, your phone may be from an earlier manufacturing batch and require one of the older firmware versions.
- Tool is Stuck on “Checking Baudrate”: This is the most common error when flashing Spreadtrum devices and indicates a driver issue. Uninstall and reinstall the Spreadtrum drivers, use a different USB port (a main one on the back of your PC is best), and try a different USB cable.
- Restoring Performance: With 1GB of RAM, this phone can become very slow over time. A full firmware flash is the best way to restore its original performance by clearing all software junk and providing a clean, factory-fresh installation of Android.
- Entering Flash Mode: To start the process, the phone must be off. Press and hold the Volume Down key, and while holding it, connect the USB cable. If that doesn’t work, try the same procedure with the Volume Up button.
FAQs
- Q1. My Advan S50A is dead (mati total). Will this firmware fix it?
- Yes. If the cause is corrupted software (a “brick”), this full firmware package and the SPD Upgrade Tool are the standard procedure for reviving the device.
- 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 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 Spreadtrum 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.
