Lyf Flame 7S Firmware Flash File Download [Stock Rom]

The Lyf Flame 7S (LS-4008) was a compact, 4-inch 4G smartphone from 2016, designed as an ultra-affordable entry into the Reliance Jio network. Its low price point was achieved with extremely limited hardware, featuring a Spreadtrum SC9830A processor and just 1GB of RAM to run the Android 5.1 Lollipop operating system. This hardware combination results in a severely compromised user experience, defined by constant system freezing and debilitating lag during even the most basic operations. The lack of memory also leads to frequent application crashes and can cause the phone to become unstable, resulting in random reboots or getting stuck in a bootloop. For owners looking to restore this device to a usable state, reinstalling the stock firmware is the only effective solution.

This guide provides the official stock ROM package for the Lyf Flame 7S. As a Spreadtrum (UNISOC) device, it must be flashed using the SPD Upgrade Tool.

Lyf Flame 7S (LS-4008) Firmware Details

Below are the key specifications for the Lyf Flame 7S. This firmware will restore the device to its Android 5.1 Lollipop software. Note that this is a Spreadtrum device and requires the SPD Upgrade Tool, not SP Flash Tool or QFIL.

Download Official Firmware for Lyf Flame 7S (LS-4008)

• Build: 20160521
  • File Name: Lyf_LS4008_20160521_5.1.zip
  • Size: 666MB
  • 🔗 Download Link: Download (MediaFire)

Why Flash This Specific Firmware?

A full firmware reinstallation is the only practical solution for the severe, hardware-induced problems this phone faces:

• Fix a Startup Bootloop: If your phone is stuck in a restart loop at the LYF logo, flashing the 20160521 firmware is the definitive way to fix it if the cause is software corruption. This replaces the entire damaged OS with a fresh copy.
• End Crippling System Freezes: To combat the constant hangs and unresponsiveness caused by the limited RAM, a clean installation of the Android 5.1 OS clears out all software clutter, giving the system a chance to operate without freezing.
• Stop Random Reboots: An unstable system often restarts on its own. Reinstalling the original system files from the 20160521 build can resolve the underlying software corruption that triggers these crashes and improve overall stability.
• Fix Crashing Apps: If essential apps crash immediately upon launch, it’s a clear sign of memory exhaustion. Flashing this firmware package reinstalls the base Android 5.1 system, freeing up the maximum possible memory for apps to run.
• Recover an Unresponsive “Bricked” Phone: In a worst-case scenario where a software error has left the phone completely unresponsive, forcing a firmware flash using the SPD Upgrade Tool is the last available recovery method.

Crucial Prerequisites Before Flashing

Before you begin, back up any accessible data. This procedure will permanently delete everything on the phone.

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

How to Flash the Firmware

This firmware is in .pac format and must be installed using the SPD Upgrade Tool on a Windows computer. Here is a brief overview:

1. Download and extract the Lyf_LS4008_20160521_5.1.zip file to a new folder.
2. Install the required Spreadtrum USB drivers on your computer.
3. Launch the SPD Upgrade Tool (UpgradeDownload.exe).
4. Click the first “Load packet” gear icon and select the .pac file from the extracted firmware folder.
5. Click the “Start downloading” (Play) button.
6. Completely power off your Lyf Flame 7S and remove the battery if possible.
7. Hold the Volume Down button on your phone and connect it to the PC via a USB cable.
8. The flashing process will begin automatically and will show a green “Passed” message when complete.

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

→ How to Use the SPD Upgrade Tool to Flash Your Smartphone

Disclaimer: Flashing a Spreadtrum device is an advanced procedure that will erase all your data and carries a significant risk of permanently damaging your device if not done correctly. We are not responsible for any data loss or hardware failures. Proceed with extreme caution.