LYF LS-4508 Firmware Flash File Download [Stock Rom]

The LYF LS-4508 was an ultra-budget 4.5-inch 4G smartphone from 2016/2017, built on extremely limited hardware. It runs Android 6.0.1 Marshmallow on a low-power Qualcomm Snapdragon 210 processor and a severely restrictive 1GB of RAM. This fundamental mismatch between the OS and the hardware is the source of the device’s critical performance flaws. The user experience is defined by constant, debilitating system freezes and lag, as the 1GB of RAM is quickly exhausted by even basic tasks. This instability frequently leads to more severe problems, including the phone getting stuck in a bootloop or rebooting randomly during use. For anyone trying to get this phone back to a functional state, a clean installation of the latest official firmware is the essential first step.

This guide provides two official stock ROM packages for the LYF LS-4508. It is a Qualcomm device and must be flashed using the QFIL tool.

LYF LS-4508 Firmware Details

Below are the key specifications for the LYF LS-4508. This firmware will restore the device to its Android 6.0.1 Marshmallow software. Note that this is a Qualcomm device and requires QFIL, not SP Flash Tool.

Why Flash the Stock Firmware on Your LYF LS-4508?

A full firmware reinstallation is the main diagnostic and repair step for the specific issues this phone faces:

• Fix a Startup Bootloop: This is the most critical fix. If your phone is stuck in a restart loop, flashing the 20170718 firmware is the definitive method to resolve it if the cause is software corruption. If the phone still won’t boot after a successful flash, the battery has likely failed.
• End System Freezes and Lag: To combat the constant hangs caused by its 1GB of RAM, a clean installation of the Android 6.0.1 OS from the latest build clears out software clutter and restores a baseline level of performance.
• Stop Random Reboots: An unstable system often restarts on its own. Reinstalling the base system files from the 20170718 ROM can resolve the underlying software corruption that triggers these crashes.
• Resolve Unreliable Wireless Connections: For unstable Wi-Fi or Bluetooth, flashing the firmware reinstalls the original radio drivers included in the 20170718 package, which can solve persistent software-level connectivity bugs.
• Fix Crashing Apps: If the camera or other essential apps crash on launch, it’s a clear sign of memory exhaustion. A clean install of the firmware gives these apps the best chance to run without failing.
• 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 QFIL is the last available recovery method.

⚠️ Important Prerequisites

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

• The latest version of the QPST package, which includes the QFIL tool.
• The correct Qualcomm HS-USB QDLoader 9008 drivers installed on your PC.

Download Official Firmware for LYF LS-4508

Two firmware versions are available. The build dated July 18, 2017, is the latest known release and is recommended. The MMB29M build is an older alternative.

• Build: 20170718 (Latest & Recommended)
  • File Name: LYF_LS-4508_MSM8909_20170718_6.0.1_QFIL(Repairmymobile.in).rar
  • Size: 1.05GB (approx.)
  • 🔗 Download Link: Download (MediaFire)
• Build: MMB29M (Older Version)
  • File Name: LYF_LS-4508_MMB29M_6.0.1_Repairmymobile.rar
  • Size: 1.0GB (approx.)
  • 🔗 Download Link: Download (MediaFire)

How to Flash the Firmware

This firmware must be installed using the QFIL (Qualcomm Flash Image Loader) tool on a Windows computer. The process involves booting the phone into a special diagnostic mode known as EDL (Emergency Download) Mode.

1. Download and extract your chosen firmware .rar file to a new folder.
2. Install the Qualcomm USB drivers and the latest QPST/QFIL tool on your computer.
3. Launch QFIL.
4. Completely power off your LYF LS-4508.
5. Boot the phone into EDL Mode. This is typically done by holding both the Volume Up and Volume Down buttons simultaneously and then connecting the phone to the PC with a USB cable. The screen will remain black, but your PC should detect a “Qualcomm HS-USB QDLoader 9008” device.
6. In QFIL, select “Flat Build” and then click “Browse” to navigate to the extracted firmware folder and select the prog_emmc_firehose_...mbn file.
7. Click “Load XML” and select the rawprogram_unsparse.xml file, followed by the patch0.xml file.
8. Click the “Download” button in QFIL to begin the flashing process.

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

→ How to Install ROM with Qualcomm Flash Image Loader (QFIL)

Disclaimer: Flashing a Qualcomm 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.