The Verykool SL4502 Fusion II LTE is a compact Android smartphone, often praised for its dual-SIM LTE capability and affordable pricing. Common concerns among users include sluggish system performance, limited RAM, apps closing unexpectedly, poor battery life, camera autofocus lag, unreliable Bluetooth connections, and device freezing after system updates or heavy app use. Users also report low audio volume and easily scratched screens. Flashing the stock firmware is recommended to restore system stability, resolve boot errors, fix software and app malfunctions, and recover devices stuck on the logo or locked after failed updates.
Verykool SL4502 Fusion II LTE Details
| Device Name | Verykool Fusion II SL4502 LTE |
|---|---|
| Model | SL4502 |
| Chipset | MediaTek MT6735M |
| Android Version | Android 5.1 (Lollipop) |
| Firmware Filename | Verykool_SL4502_LTE_5.1.zip |
| Firmware Version | Stock 5.1 (official, 2015-2017 series) |
| File Size | 677MB |
| File Type | ZIP (contains .scatter file, .img partitions, drivers, SP Flash Tool guide) |
| Flashing Tool | MediaTek SP Flash Tool |
| Screen | 4.5″ IPS LCD, 480x854px |
| Camera | 8MP rear (AF, LED flash), 5MP front |
| RAM / Storage | 1GB RAM / 8GB internal (microSD expansion) |
| Battery | 1800mAh, removable |
| Connectivity | Dual SIM (LTE Cat4), Wi-Fi, Bluetooth 4.0, GPS |
| Other Features | Scratch-resistant glass, FM, microUSB |
Warning: Flashing the wrong firmware or disconnecting during the process may permanently brick your device or corrupt important data. Always confirm your SL4502 variant and fully back up all files before using SP Flash Tool.
Download Official Firmware for Verykool SL4502 Fusion II LTE
This firmware restores factory settings, solves boot issues, and removes persistent system errors.
📄 Filename: Verykool_SL4502_LTE_5.1.zip
📦 Size: 677MB
🗓️ Build Date: 2015-2017 series
🔢 Firmware Version: Stock Android 5.1 Lollipop
⬇️ Download Link: MediaFire
How to Flash the Firmware
- Unzip Verykool_SL4502_LTE_5.1.zip and confirm all model-specific files.
- Install MediaTek USB drivers and confirm the presence of the correct scatter file.
- Open SP Flash Tool and load the scatter file from the firmware folder.
- With the phone powered off, connect via USB and click “Download” in SP Flash Tool to begin flashing.
- Wait for the green check mark before disconnecting the phone or restarting.
For complete step-by-step instructions with visuals, see the full guide here.
