FOSSIBOT S3 pro
FOSSIBOT S3 Pro Unlocked Smartphone User Manual
Model: S3 pro
1. Introduction
This manual provides detailed instructions for the safe and efficient use of your FOSSIBOT S3 Pro Unlocked Smartphone. Please read this manual thoroughly before operating the device and retain it for future reference.
The FOSSIBOT S3 Pro is a feature-rich smartphone designed for a comprehensive mobile experience. Key features include a 6.67" FHD+ AMOLED curved display, a MediaTek Helio G85 processor, 20GB (virtual) RAM, 128GB internal storage (expandable), a 5000mAh battery, a 64MP triple camera system, and an innovative 1.09" functional rear display, running on Android 14 OS.
2. Package Contents
Upon unboxing, please verify that all items are present and in good condition:
- FOSSIBOT S3 Pro Unlocked Smartphone
- USB Cable
- User Manual (this document)
- (Other accessories may vary by region or package)
3. Device Overview
Familiarize yourself with the physical components of your FOSSIBOT S3 Pro.

Figure 3.1: Front and Rear View of FOSSIBOT S3 Pro. This image displays the smartphone from both the front, highlighting its large display, and the rear, showcasing the circular camera module and the unique functional rear display.

Figure 3.2: Key Features Diagram. This diagram illustrates various features including the 6.67" FHD+ AMOLED Curved Display, 64MP AI Camera, Under-display Fingerprint unlocking, 5000mAh battery with 18W Fast Charge, Global Frequencies, NFC, 128GB ROM, 20GB RAM, Helio G85 Octa-core processor, and the Functional Rear Display.
- Front Display: 6.67" FHD+ AMOLED Curved Display for immersive visuals.
- Rear Display: 1.09" functional display for quick access to notifications and personalized dials.
- Camera Module: Houses the 64MP main camera, 8MP wide-angle, and 2MP macro camera.
- Fingerprint Sensor: Integrated under the display for secure unlocking.
- USB-C Port: For charging and data transfer.
- SIM Card Slot: Supports Dual SIM and expandable memory (up to 1TB TF Card).
- Power Button / Volume Buttons: Located on the side for easy access.
4. Setup
4.1. Inserting SIM Card and SD Card
To ensure proper network connectivity and storage expansion, follow these steps:
- Locate the SIM card tray on the side of the phone.
- Insert the SIM ejector tool (not included, but typically comes with smartphones) into the small hole next to the tray and push gently until the tray pops out.
- Place your Nano-SIM card(s) and/or microSD card into the designated slots on the tray. Ensure the gold contacts face downwards.
- Carefully push the tray back into the phone until it clicks into place.

Figure 4.1: Illustration of SIM and SD card insertion. This image shows the SIM tray with slots for two SIM cards and one expandable memory card, demonstrating how to properly insert them into the device.
4.2. Initial Power On and Setup Wizard
After inserting your SIM card(s), power on your device for the first time:
- Press and hold the Power button until the FOSSIBOT logo appears.
- Follow the on-screen instructions to complete the initial setup wizard. This includes selecting your language, connecting to a Wi-Fi network, setting up your Google account, and configuring security options like fingerprint unlock.
Video 4.1: Initial phone setup and rear display functionality. This video, provided by a customer, demonstrates the initial boot-up process of the FOSSIBOT S3 Pro, showing the main screen and then showcasing the dynamic clock faces and notification display on the functional rear screen.
5. Operating Your Smartphone
5.1. Basic Navigation
- Touchscreen Gestures: Tap, swipe, pinch-to-zoom are standard Android gestures.
- Home Screen: Customize with widgets and app shortcuts.
- Notifications Panel: Swipe down from the top of the screen to access quick settings and notifications.
5.2. Functional Rear Display
The 1.09" functional rear display offers quick information and personalization.
- Personalized Dial: Choose from various clock faces and designs.
- Notifications: View incoming calls, messages, and app notifications without turning the main screen on.
- Quick Information: Access time, date, and other essential data.

Figure 5.1: Functional Rear Display in Use. This image demonstrates the 1.09" functional rear display, showing examples of personalized dials and how it displays notifications and information from various applications.
5.3. Camera Usage
The FOSSIBOT S3 Pro features a 64MP+8MP+2MP triple camera system.
- Launching Camera: Tap the Camera app icon or use a quick gesture if configured.
- Modes: Switch between Photo, Video, Portrait, Night Mode, Macro, Pro Mode, Panorama, Slow Motion, Time Lapse, and more.
- Settings: Adjust resolution, flash, timer, and other camera parameters.

Figure 5.2: Camera Features Overview. This image highlights the 64MP main camera, 2MP macro camera, and 8MP front camera, showcasing example photos taken with the device.

Figure 5.3: Camera Modes and Filters. This image displays various camera modes such as Beauty Mode, AI Emoji, and Night Mode, along with an array of filters to enhance photographic output.
5.4. Battery Management
The 5000mAh battery provides extended usage. To optimize battery life:
- Reduce screen brightness.
- Disable Wi-Fi, Bluetooth, and GPS when not in use.
- Close background apps.
- Utilize battery saver mode.
- Charge using the provided USB cable and a compatible 18W fast charger.

Figure 5.4: 5000mAh Battery and Quick Charge. This image illustrates the large 5000mAh battery capacity and its 18W quick charge capability, along with estimated usage times for standby, music, calls, video, and gaming.
5.5. Connectivity
- Wi-Fi: Connect to wireless networks via Settings > Network & internet > Wi-Fi.
- Bluetooth: Pair with Bluetooth devices via Settings > Connected devices > Bluetooth.
- NFC: Use for contactless payments and quick pairing. Enable via Settings > Connected devices > Connection preferences > NFC.
- GPS: For navigation and location services.
- 4G Connectivity: Supports global frequencies for cellular data.

Figure 5.5: Multi-functional NFC and Accurate Navigation. This image demonstrates the NFC capability for mobile payments and the GPS functionality for precise navigation.

Figure 5.6: Global Frequencies and Dual SIM Dual 4G. This image illustrates the phone's support for global network frequencies and its dual SIM card capability, showing the SIM tray and supported frequency bands.
6. Maintenance
Proper care extends the life of your smartphone.
- Cleaning: Use a soft, lint-free cloth to clean the screen and body. Avoid harsh chemicals.
- Software Updates: Regularly check for and install system updates to ensure optimal performance and security. Go to Settings > System > System update.
- Storage Management: Periodically clear cache, delete unnecessary files, and uninstall unused apps to free up storage space.
- Temperature: Avoid exposing the phone to extreme temperatures (hot or cold).
- Water Resistance: The device is not specified as water-resistant. Avoid contact with liquids.
7. Troubleshooting
Common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone does not turn on | Low battery; System crash | Charge the phone for at least 30 minutes. Press and hold the Power button for 10-15 seconds to force restart. |
| Apps crashing or freezing | Insufficient RAM; App bug; Outdated software | Close background apps. Clear app cache (Settings > Apps > [App Name] > Storage > Clear cache). Update the app or system software. |
| Poor network signal | Weak signal area; Incorrect SIM insertion; Network settings issue | Move to an area with better signal. Reinsert SIM card. Reset network settings (Settings > System > Reset options > Reset Wi-Fi, mobile & Bluetooth). |
| Battery drains quickly | High screen brightness; Many background apps; Excessive usage | Reduce screen brightness. Close unused apps. Enable battery saver mode. Limit usage of power-intensive apps. |
| Fingerprint sensor not working | Dirty sensor; Incorrect finger placement; Software glitch | Clean the screen where the sensor is located. Ensure your finger is clean and dry. Re-register your fingerprint. Restart the phone. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | FOSSIBOT S3 Pro |
| Operating System | Android 14 |
| Processor | MediaTek Helio G85 Octa-core |
| RAM | 6GB (up to 20GB with virtual RAM) |
| Internal Storage | 128GB |
| Expandable Storage | Up to 1TB (TF Card) |
| Main Display | 6.67" FHD+ AMOLED Curved Display (1080x2400 Resolution, 394 PPI) |
| Rear Display | 1.09" Functional Display |
| Rear Camera | 64MP Main + 8MP Wide-angle + 2MP Macro |
| Front Camera | 8MP |
| Battery Capacity | 5000mAh |
| Charging | 18W Fast Charge |
| Connectivity | 4G, Wi-Fi, Bluetooth, NFC, GPS (GPS, GLONASS, GALILEO, BEIDOU) |
| SIM Card | Dual SIM |
| Dimensions | 6.4 x 2.93 x 0.34 inches (162.56 x 74.42 x 8.65 mm) |
| Weight | 7 ounces (199 grams) |
| Color | Green |
| What's in the Box | USB Cable |
9. Warranty and Support
FOSSIBOT provides comprehensive support for your S3 Pro smartphone.
- Warranty: Enjoy peace of mind with a 1-year free warranty.
- Customer Service: 24-hour customer service is available to address any issues or questions you may have.
- For support, please refer to the contact information provided in your product packaging or visit the official FOSSIBOT website.
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