The Lyf Flame 3 (LS-4001) was an ultra-low-end 4G smartphone released in 2016, designed to be one of the cheapest VoLTE-capable phones on the market. This rock-bottom price was achieved by using extremely limited hardware, including a Spreadtrum SC9830A processor and a critically low 512MB of RAM to run Android 5.1 Lollipop. This severe lack of memory makes the phone functionally obsolete for most apps and results in a deeply frustrating user experience. Core problems include constant system-wide freezing, debilitating lag, frequent app crashes, and instability that leads to bootloops or random reboots. For anyone attempting to restore this device to a basic, functional state, reinstalling the official stock firmware is the only viable method.
This guide provides the official stock ROM package for the Lyf Flame 3. As a Spreadtrum (UNISOC) device, it must be flashed using the SPD Upgrade Tool.
Lyf Flame 3 (LS-4001) Firmware Details
Below are the key specifications for the Lyf Flame 3. 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.
| Attribute | Details |
|---|---|
| 📱 Device | Lyf Flame 3 (LS-4001) |
| 🆔 Chipset | Spreadtrum SC9830A |
| 🤖 Android OS | 5.1 Lollipop |
| ✅ Build Version | V10.0 |
| 📂 File Type | PAC Firmware |
| 💻 Flashing Tool | SPD Upgrade Tool |
Download Official Firmware for Lyf Flame 3 (LS-4001)
- Build: V10.0
- File Name: Lyf_Flame_3_LS_4001_V10.0.zip
- Size: 1010MB
- 🔗 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 restarting at the LYF logo, flashing the V10.0 firmware is the definitive way to fix it if the cause is software corruption. It replaces the entire damaged OS with a fresh copy.
- End Crippling System Freezes: To combat the constant hangs caused by the 512MB of RAM, a clean installation of the Android 5.1 OS from the V10.0 build clears out software clutter, giving the system its best chance to operate without freezing.
- Stop Apps from Crashing: If essential apps crash immediately upon launch, it’s a clear symptom of memory exhaustion. Flashing this firmware package reinstalls the base Android 5.1 system, freeing up the maximum possible memory for apps to run.
- End Random Reboots: An unstable system often restarts on its own. Reinstalling the original system files from the V10.0 build can resolve the underlying software corruption that triggers these crashes and improve overall stability.
- 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:
- Download and extract the
Lyf_Flame_3_LS_4001_V10.0.zipfile to a new folder. - Install the required Spreadtrum USB drivers on your computer.
- Launch the SPD Upgrade Tool (UpgradeDownload.exe).
- Click the first “Load packet” gear icon and select the
.pacfile from the extracted firmware folder. - Click the “Start downloading” (Play) button.
- Completely power off your Lyf Flame 3 and remove the battery.
- Hold the Volume Down button on your phone and connect it to the PC via USB cable.
- 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.
