Match the exact model, region, and branch name. Similar model numbers are not the same device.
Firmware files are here on Inar Guide. Tutorials, flash tools and USB drivers are on FlashGuideHub.
The Kimfly M4 is an affordable Android phone powered by the Spreadtrum SC7731C quad-core chipset. It is infamous for frequent bootloops, app crashes, “no network/service,” or stuck logo after system updates or malware. Flashing a verified factory SPD ROM below restores smooth Android 6.0 operation, fixes critical bugs, and repairs IMEI/baseband loss.
Kimfly M4 Firmware Details
| Device Name | Kimfly M4 |
| Model | M4 |
| Chipset | Spreadtrum SC7731C (Quad-core, 1.2GHz) |
| Android Version | Android 6.0 Marshmallow |
| Firmware Versions | S16F_ZX_235_V01_20170218_6.0 / S16_A_BP235_LX_V2.0_20170528_6.0 |
| Build Dates | 18 Feb 2017 / 28 May 2017 |
| File Sizes | 755.35MB / 803.76MB |
| File Types | ZIP (PAC scatter upgrade firmware) |
| Flashing Tool | SPD Upgrade Tool (ResearchDownload/UpgradeDownload) |
| Device Specifications | |
|---|---|
| Display | 5-inch IPS, 480 × 800 px, 196ppi |
| Processor | SC7731C Quad-core 1.2GHz |
| RAM | 512MB |
| Storage | 8GB (expandable up to 32GB microSD) |
| Rear Camera | 5MP, flash, video |
| Front Camera | 2MP |
| Battery | 2800mAh Li-ion removable |
| SIM Type | Dual SIM (standby, micro SIM) |
| Connectivity | 3G, WiFi 802.11b/g/n, Bluetooth 3.0, GPS, microUSB |
| Sensors | Accelerometer, Proximity, Compass, Gyroscope |
| Body | 148.5 × 75.5 × 8.6 mm, 168–200g, Plastic |
Warning: Flashing any ROM incorrectly or on the wrong version/model can hard-brick Kimfly M4. Always confirm your actual board, backup contacts/photos, and keep battery above 50% before starting.
Download Official Firmware for Kimfly M4
Use the correct SPD firmware based on your build number or board (see under battery or in About Phone/Settings). Both ROMs fix bootlogo error, baseband loss, and unresponsive OS. If unsure, start with the newer “BP235_LX_V2.0” build.
- S16F_ZX_235_V01_20170218_6.0.zip
📦 Size: 755.35MB
🗓️ Build Date: 18 Feb 2017
⬇️ Download from MediaFire - S16_A_BP235_LX_V2.0_20170528_6.0.zip
📦 Size: 803.76MB
🗓️ Build Date: 28 May 2017
⬇️ Download from MediaFire
How to Flash the Firmware
5-step SPD flashing tutorial:
- Extract the ZIP file on your computer.
- Install SPD USB drivers, launch UpgradeDownload/ResearchDownload Tool.
- Load the “.PAC” file—select and confirm firmware board/build.
- Click Play/Start, then plug in your powered-off device (hold Vol Down if needed).
- Wait for completion (“Passed”/Green), disconnect, and boot Kimfly M4.
For illustrated step-by-step and troubleshooting, see full Spreadtrum guide here.