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.
