The Positivo Twist 2 Fit S509 is a widely used, entry-level Android device praised for its affordability, but like many MT6580-based smartphones, it is susceptible to a variety of software problems. Firmware corruption, failed OTA updates, malware, and botched attempts to root have led users to experience bootloops (stuck at logo), random freezing, crashes, failed app installations, loss of mobile signal, and even dead touchscreen issues.
This official stock firmware (Positivo_Twist_2_Fit_S509_MT6580_280519.zip) addresses all such system errors, restoring your device to factory condition and fixing deep-rooted Android OS faults many users have complained about in reviews and community forums.
Positivo Twist 2 Fit S509 Details
| Device Name | Positivo Twist 2 Fit |
| Model | S509 |
| Chipset | MediaTek MT6580 |
| CPU | Quad-core Cortex-A7 1.3GHz |
| GPU | Mali-400 MP2 |
| RAM | 1GB |
| Internal Storage | 16GB |
| Android Version | Android 8.1 (Go Edition) |
| Display | 5.0″ FWVGA (854x480px) |
| Rear Camera | 8MP |
| Front Camera | 5MP |
| Battery | 2000mAh (removable) |
| Connectivity | Dual SIM, 3G, Wi-Fi, Bluetooth 4.0, FM radio, Micro USB |
| Firmware Filename | Positivo_Twist_2_Fit_S509_MT6580_280519.zip |
| Firmware Version | Build 280519 |
| Build Date | May 28, 2019 |
| File Size | 645 MB |
| File Type | Scatter File / ROM zip |
| Flashing Tool | SP Flash Tool (for MTK MediaTek Devices) |
Unique Flash Warning for S509
Flashing the wrong file or interrupting a firmware update with SP Flash Tool can brick the S509 for good, especially if the scatter file does not match your exact hardware version. Never attempt flashing with less than 65% battery, and always use the original cable and a direct USB port. If your PC loses power or you remove the cable during the process, the phone may not recover via normal methods. Flashing the wrong firmware risks losing touch, modem, or camera functionality permanently.
Download Official Firmware for Positivo Twist 2 Fit S509
This is the authorized stock firmware package for the S509, fully signed and ready for SP Flash Tool restoration. Use only on exact S509 devices. This firmware:
- Unbricks phones stuck at boot logo or restart loops
- Repairs failed OTA/software updates and restores lost partitions
- Fixes system UI errors, network/configuration loss, and FRP lock
- Removes malware/unauthorized mods for clean install
📄 Filename: Positivo_Twist_2_Fit_S509_MT6580_280519.zip
📦 Size: 645MB
🗓️ Build Date: May 28, 2019
🔢 Build Version: 280519
🤖 Android Version: 8.1 (Go Edition)
⬇️ Download Link: Google Drive – Positivo_Twist_2_Fit_S509_MT6580_280519.zip
How to Flash the Firmware
You can restore your S509 in 5 quick steps with SP Flash Tool:
- Download and install MediaTek VCOM and Android USB drivers on your Windows PC. Extract the firmware ZIP completely.
- Open SP Flash Tool and load the MT6580_Android_scatter.txt from the extracted firmware folder.
- Power off the phone; connect it via Micro USB to your PC while holding Volume Down (if required for detection).
- Click “Download” in SP Flash Tool and wait for the green “OK” checkmark before disconnecting.
- Power on the S509. If needed, boot into recovery/wipe data for a fresh start.
See the full SP Flash Tool flashing guide here (with video & troubleshooting).
MediaTek (MTK) Device Flashing Guide
The S509 uses MediaTek’s MT6580 chipset. For advanced troubleshooting, see:
SP Flash Tool Official Guide
