Download Leagoo Alfa 5 Stock Firmware (Official .pac File)

The Leagoo Alfa 5 was an ultra-budget 3G smartphone from 2016, designed for the most basic, entry-level use. Its hardware is extremely limited, featuring a Spreadtrum SC7731G processor, a minimal 1GB of RAM, and just 8GB of internal storage. The device runs on Android 5.1 Lollipop, skinned with Leagoo’s OS 1.1. This combination of dated software and insufficient hardware leads to crippling performance lag, constant app crashes, and insufficient storage errors. For owners of this phone, reinstalling the official stock firmware is the only effective way to restore a baseline level of functionality.

Crucial Safety Warning: This firmware is for a Spreadtrum (SPD) device. It is a .pac file and must be flashed using the SPD Upgrade Tool or Research Download Tool. Do NOT attempt to use SP Flash Tool, as it is incompatible and will brick your device.

Leagoo Alfa 5 Firmware Details

Below are the key specifications for the Leagoo Alfa 5. Note the Spreadtrum chipset and the corresponding .pac file type, which require a specific flashing procedure.

Why Flash the Stock Firmware on Your Leagoo Alfa 5?

Flashing the official stock firmware is the only viable solution for the severe, hardware-related issues this phone faces:

• Fix Extreme Performance Lag: A clean installation of this Android 5.1 firmware is the only way to address the severe system-wide lag caused by running the OS on just 1GB of RAM, making the phone usable for only the most basic tasks.
• Resolve “Insufficient Storage” Errors: Flashing this January 2016 build performs a full factory reset, clearing the limited 8GB of internal storage to allow the operating system and essential apps to function without constant errors.
• Stop Constant App Crashes: By restoring the original, lightweight Leagoo OS 1.1, you minimize background processes and give foreground apps a slightly better chance of running without crashing due to lack of memory.
• Remove Malware and Viruses: On such an old and unsupported device, a full firmware flash is the only way to guarantee the complete removal of any security threats.
• Fix Bootloop Errors: The definitive solution for a phone that is stuck on the Leagoo startup logo and fails to boot.

⚠️ Important Prerequisites

Before you begin, back up any accessible data. This process will completely erase the phone’s internal storage.

• The latest version of the SPD Upgrade Tool or Research Download Tool.
• The correct Spreadtrum USB drivers installed on your PC.

Download Official Firmware for Leagoo Alfa 5

• Build Date: 20160118
  • File Name: Leagoo_Alfa_5_20160118_5.1.zip
  • Size: 535 MB
  • 🔗 Download Link: Download (MediaFire)

How to Flash the Firmware

This firmware must be installed using the SPD Upgrade Tool. The process involves loading a `.pac` file from the downloaded firmware. Here is a summary of the steps:

1. Download and extract the Leagoo_Alfa_5_20160118_5.1.zip file. Inside, you will find the firmware file with a .pac extension.
2. Download and install the Spreadtrum USB drivers on your PC.
3. Launch the SPD Upgrade Tool software.
4. Click the “Load Packet” button (it looks like a single gear icon) and select the .pac firmware file you just extracted.
5. Completely power off your Leagoo Alfa 5.
6. Click the “Start Downloading” button (it looks like a play icon).
7. While the phone is off, press and hold the Volume Down button, and then connect it to your PC via USB cable. The flashing process will begin automatically.
8. Once the progress bar turns green and shows a “Passed” message, the flash is complete. You can now disconnect your phone and turn it on.

For a complete, step-by-step tutorial with screenshots and troubleshooting, please follow our master guide:

→ How to Flash .pac Firmware Using SPD Upgrade Tool

Disclaimer: Flashing firmware is an advanced procedure. This firmware and tool are for Spreadtrum devices only. Using the wrong files or not following the instructions precisely can permanently damage your device. Proceed with extreme caution.