Download LYF Flame 7 (LS-4006) Stock Firmware (.pac File)

The LYF Flame 7 (model LS-4006) was an ultra-budget 4G VoLTE smartphone from 2016, designed to be one of the most affordable entry points into 4G. Its hardware is very limited, featuring a 4.0-inch display, a Spreadtrum SC9830A processor, and just 1GB of RAM running Android 5.1 Lollipop. Due to these minimal specifications, the device is highly prone to a critical software failure where it gets stuck on the LYF logo during startup (a “bootloop”). For owners facing this or other issues like a dead device or severe lag, flashing the official stock firmware is the only reliable solution.

Crucial Safety Warning: This is a Spreadtrum (SPD) device. The firmware is a .pac file and must be flashed using the SPD Upgrade Tool or Research Download Tool. Do NOT attempt to use QFIL or SP Flash Tool, as they are incompatible and will not work.

LYF Flame 7 (LS-4006) Firmware Details

Below are the key specifications for the LYF Flame 7. Note the Spreadtrum chipset, which requires the specific SPD flashing procedure.

Download Official Firmware for LYF Flame 7 (LS-4006)

• Software Version: 01_09
  • File Name: Lyf_LS-4006_01_09.zip
  • Size: 990 MB
  • 🔗 Download Link: Download (MediaFire)

Why Flash the Stock Firmware on Your LYF Flame 7?

Flashing this official stock ROM is the best way to fix the specific, widely-reported issues with this model:

• Fix Bootloop (Stuck on Logo): This is the most critical reason to flash. A clean installation of this Android 5.1 firmware is the definitive fix for a phone that powers on but never moves past the LYF startup logo.
• Unbrick a Dead Phone: Flashing the firmware is often the only way to revive a LYF Flame 7 that has become completely unresponsive or “hard bricked” after a failed update.
• Fix Extreme Performance Lag: By restoring the original, lightweight Android 5.1 OS, you can address the severe system-wide lag caused by running the OS on just 1GB of RAM.
• Restore Lost IMEI: A clean flash of the official firmware can restore a lost or corrupted IMEI number, which is essential for making calls and using mobile data.
• Remove FRP Lock: A full firmware flash will reset the device, removing any Google Factory Reset Protection lock that is preventing access.

⚠️ Important Prerequisites

Before you begin, back up any accessible data. This process will completely erase all data from 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.

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 Lyf_LS-4006_01_09.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 LYF Flame 7.
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. Using the wrong tool or files can permanently damage your device. Proceed with extreme caution. We are not responsible for any data loss or hardware issues.