The Lyf Water 4 (model LS-5005) was a mid-range 4G smartphone from 2016, equipped with a 5-inch HD display, a Qualcomm Snapdragon 410 processor, and 2GB of RAM. The device ran on Android 5.1.1 Lollipop, an operating system that, over time, can lead to software issues such as performance lag, battery drain, and bootloops. For owners experiencing these problems, a clean installation of the official stock firmware is the best way to restore the device’s original stability and performance.
Crucial Safety Warning: This is a Qualcomm-powered device, and the firmware is in a QFIL format. It must be flashed using the QPST Flash Tool (QFIL). Do NOT attempt to use SP Flash Tool or any other software, as it is incompatible and will not work.
Lyf Water 4 (LS-5005) Firmware Details
Below are the key specifications for the Lyf Water 4. Note the Qualcomm chipset, which requires the specific QFIL flashing procedure.
| Attribute | Details |
|---|---|
| 📱 Device | Lyf Water 4 (LS-5005) |
| 🆔 Chipset | Qualcomm Snapdragon 410 (MSM8916) |
| 🤖 Android OS | 5.1.1 Lollipop |
| ✅ Software Version | V020021 |
| 📂 File Type | Qualcomm Firmware (QFIL) |
| 💻 Flashing Tool | QPST Flash Tool (QFIL) |
Why Flash the Stock Firmware on Your Lyf Water 4?
Flashing this official stock ROM is the best way to address the specific, widely-reported issues associated with this device and its Android version:
- Fix Bootloop (Stuck on Logo): A clean installation of this Android 5.1.1 firmware is the most reliable fix for a phone that powers on but never moves past the Lyf startup logo.
- Resolve Wi-Fi Connectivity Issues: This firmware can fix common Lollipop bugs where Wi-Fi fails to connect, drops unexpectedly, or won’t reconnect to known networks.
- Fix Abnormal Battery Drain: A fresh installation of the factory OS can resolve software bugs that cause the 2920mAh battery to drain much faster than expected.
- Improve System Performance: By reinstalling the original, optimized operating system, you can eliminate the lag and stuttering that develops over time from software bloat and corrupted data.
- Unbrick a Dead Phone: Flashing the firmware is often the only way to revive a Lyf Water 4 that has become completely unresponsive or “hard bricked” after a failed update or software error.
⚠️ 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 QPST Flash Tool (with QFIL).
- The correct Qualcomm HS-USB QDLoader 9008 drivers installed on your PC.
Download Official Firmware for Lyf Water 4 (LS-5005)
- Software Version: V020021
- File Name: Lyf_Water_4_LS-5005_PC_SW_VER_020021_QFIL.zip
- Size: 1.07 GB
- 🔗 Download Link: Download (MediaFire)
How to Flash the Firmware
This firmware must be installed using the QFIL application. The process involves booting the phone into EDL mode and loading the firmware files. Here is a summary of the steps:
- Download and extract the firmware file and the QPST tool to a new folder.
- Install the Qualcomm HS-USB QDLoader 9008 drivers on your PC.
- Completely power off your Lyf Water 4.
- Enter EDL Mode: Press and hold both the Volume Up and Volume Down keys at the same time, then connect the phone to your PC with a USB cable. The screen will remain blank, but your PC should detect the device as “Qualcomm HS-USB QDLoader 9008” in Device Manager.
- Launch the QFIL application.
- Click “Select Port” and choose the Qualcomm port.
- Under “Select Build Type,” choose “Flat Build.”
- Click “Browse…” next to “Select Programmer,” and navigate to the extracted firmware folder to select the file named
prog_emmc_firehose_...mbn. - Click “Load XML…” and select the
rawprogram_unsparse.xmlfile, followed by thepatch0.xmlfile when the next window opens. - Click the blue “Download” button to begin the flashing process. Once you see a “Download Succeeded” message, the process is complete.
For a complete, step-by-step tutorial with screenshots and troubleshooting, please follow our master guide:
→ How to Flash Qualcomm Firmware Using QFIL
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.
