1. Introduction
Welcome to the user manual for your new DOOGEE S300 Plus Thermal 5G Rugged Phone. This device is engineered for extreme durability and high performance, featuring advanced thermal imaging, a powerful MediaTek Dimensity 8300 5G chipset, a massive 11000mAh battery, and a versatile AI triple camera system. This manual will guide you through the setup, operation, maintenance, and troubleshooting of your device to ensure you get the most out of its robust capabilities.
Video: DOOGEE S300 Plus Thermal 5G Rugged Phone Product Overview.
2. Package Contents
Please check the box for the following items:
- 1 x DOOGEE S300 Plus Thermal Rugged Phone
- 1 x Type-C USB Cable
- 1 x Charger (66W)
- 1 x Protective Film (Pre-applied)
- 1 x Anti-explosion film
- 1 x Packing Box
- 1 x User Manual
- 1 x Warranty Card

Image: All items included in the package.
3. Device Overview
The DOOGEE S300 Plus Thermal features a robust design with strategically placed components for optimal functionality and durability.
Physical Features:
- Front Camera: For selfies and video calls.
- Receiver: Earpiece for calls.
- 200MP Main Camera: High-resolution primary camera.
- 8MP Long Focus Camera: For optical and digital zoom.
- 64MP Night Vision Camera: For enhanced low-light imaging.
- Thermal Imaging Camera: Integrated thermal sensor.
- Infrared Night Vision Light: Assists night vision camera.
- Rear Flashes: For illumination in photos and videos.
- SIM/TF Card Slot: Supports two Nano-SIM cards and one TF card.
- Volume Buttons: Adjust media and call volume.
- Custom Function Keys: Programmable for quick access to features.
- Power Button & Fingerprint Sensor: For power control and secure unlocking.
- Speaker: For audio output.
- Type-C Port: For charging and data transfer.
- Microphone: For voice input.
- Infrared Indicator Light: For smart infrared remote functionality.

Image: Front and back view of the DOOGEE S300 Plus Thermal, highlighting key features.
4. Initial Setup
4.1. Installing SIM/TF Cards
- Locate the SIM/TF card slot on the side of your phone.
- Use the provided SIM ejector tool to open the tray.
- Carefully place your Nano-SIM cards and/or TF card into the designated slots. Ensure they are correctly oriented.
- Gently push the tray back into the phone until it clicks into place.
4.2. Powering On/Off
- To Power On: Press and hold the Power button (integrated with the fingerprint sensor) until the DOOGEE logo appears.
- To Power Off: Press and hold the Power button, then select 'Power off' from the options on the screen.
4.3. Initial Configuration
Upon first power-on, follow the on-screen prompts to set up your device. This includes selecting your language, connecting to Wi-Fi, setting up your Google account, and configuring security features like fingerprint and face unlock.
5. Operating Your Device
5.1. Basic Navigation (Android 16)
Your phone runs on Android 16, offering a smart and intuitive user experience. Navigate using gestures or on-screen buttons as configured during setup.

Image: Smarter Android 16 Experience features.
5.2. POC Walkie Talkie
The S300 Plus Thermal supports Push-to-Talk (POC) functionality for instant communication. This feature allows for seamless connectivity, acting like a walkie-talkie.
- Activation: Access the POC application (e.g., POCSTARS) on your device.
- Usage: Press and hold the designated custom function key to transmit your voice, and release to listen.
- Note: POC intercom service may be restricted in certain regions (e.g., Russia & Iran).

Image: POC Walkie Talkie in use.
5.3. Smart Infrared Remote
Utilize the built-in infrared remote to control various household appliances such as TVs, air conditioners, fans, speakers, and lights. A compatible remote app is required to operate this feature.

Image: Smart Infrared Remote controlling home devices.
5.4. Gemini AI
The integrated Gemini AI acts as your intelligent assistant, enhancing various tasks:
- Content Creation: Storytelling, poetry, copywriting, image generation.
- Information Retrieval: Document search, summarization, key insights extraction.
- Code Development: Code writing, debugging, explanation.
- Visual Understanding: Object recognition, scene analysis, text extraction.

Image: Built-in Gemini AI features.
6. Camera Features
The S300 Plus Thermal is equipped with a powerful AI Triple Camera system:
- 200MP Main Camera (S5KHP2 Sensor): Capture stunning clarity with advanced imaging. Features include F/1.8 aperture, 85° FOV, PDAF, and dual flashes. Supports HDR, AI Camera, various photo modes (Pro, Portrait, Gif, Panorama, Filter, QR Code, 200MP, Mono, Anti-flicker, Slow Motion, DualView, Documents, Super Night).
- 64MP Night Vision Camera (OV64B Sensor): See the unseen in complete darkness with F/1.79 aperture and 79.8° FOV.
- 8MP Long Focus Camera (Hi847 Sensor): Offers 3.0x optical zoom and 50x digital zoom for sharp distant shots.
- 32MP Front Camera (S5KGD1SP Sensor): Take sharp and vibrant selfies with 80.4° FOV and F/2.25 aperture.
Video Recording:
- Rear Camera: Supports 4K, 1080p, 720p, and 480p video capture.
- Front Camera: Supports 1080p, 720p, and 480p video capture.

Image: Cutting-Edge 200MP Main Camera for Extreme Detail.

Image: Night Vision, Telephoto Zoom, and Front Camera capabilities.
7. Thermal Imaging
The S300 Plus Thermal integrates a high-definition thermal imaging camera for precision thermal detection.
- Resolution: 256x192 pixels with 12µm pixel spacing.
- Refresh Rate: 25Hz for real-time imaging.
- Detection Range: 8-14 µm.
- Thermometric Range:
- Industrial: -15°C to +150°C (high gain), 50°C to +550°C (low gain).
- Biological: 30°C to 45°C.
- Thermometric Accuracy:
- Industrial: ±2°C or ±2%.
- Biological: ±0.5°C.
- Features: Global Temperature Measurement, Temperature Ruler, Image Mode, Color Palette, Fill Light, Detail Enhancement (AI-assisted), Smart Temperature Alerts, Multi-Point & Area Measurement, AI Fusion Modes (IR + RGB).

Image: Clearest Thermal Imaging Ever Achieved.

Image: Precision Thermal Detection features.

Image: Thermal Imaging applications for work, adventure, and safety.
8. Connectivity
8.1. Networks
The S300 Plus Thermal supports a wide range of network bands for global compatibility:
- NR (5G): N1/N3/N5/N7/N8/N20/N28/N38/N40/N41/N71/N77/N78/N79
- FDD: B1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28A/28B/66/71
- TDD: B34/38/39/40/41
- WCDMA: B1/2/4/5/6/8/19
- GSM: B2/3/5/8
- Supports EDGE/GPRS.
8.2. Wireless Connectivity
- Wi-Fi: WiFi6E (802.11 ax/ac/a/b/g/n) for fast and stable wireless internet.
- Bluetooth: BT5.4 for connecting to wireless accessories.
- NFC: Supports Google Pay and other NFC functionalities.
- FM Radio: Supported (requires headphones to be plugged in for external playback).
- OTG: Supports On-The-Go functionality, including reverse charging.
8.3. Navigation
Equipped with a precise navigation system supporting GPS, Glonass, Galileo, and Beidou (L1+L5) for accurate positioning.

Image: More Features including navigation, biometrics, and wireless connectivity.
9. Battery and Charging
The S300 Plus Thermal is powered by a massive 11000mAh Silicon-Carbon battery, providing unstoppable power for extended use.
- Battery Capacity: 11000mAh
- Charging: Supports 66W Fast Charging.
- Battery Life Estimates:
- Music Playing: 144 hours
- Video Watching: 24 hours
- Calling: 88 hours
- Standby: 38 days
- Charge Cycles: 1000+ charge cycles.

Image: 11000mAh Silicon-Carbon Battery details.
10. Ruggedness and Durability
Designed for extreme environments, the DOOGEE S300 Plus Thermal boasts impressive durability certifications:
- IP68/IP69K Certified: Fully waterproof, dustproof, and drop-proof for extreme outdoor conditions.
- MIL-STD-810H Certified: Meets military-grade standards for resistance against drops, shocks, and extreme temperatures.
- Reinforced Composite Armor: PC, TPU, and composite layers create a tough outer shell that resists scratches and drops.
- Rugged Titan Framework: Aerospace aluminum-titanium frame for strong impact resistance and efficient heat dissipation.
- Superior Sealing & Compact Design: In-mold injection tightens the structure for better sealing and enhanced durability.

Image: IP68 / IP69K / MIL-STD-810H Certified features.
11. Technical Specifications

Image: Comparison of S300 series models.
| Feature | Specification |
|---|---|
| Model | S300 Plus Thermal |
| Operating System | Android 16 |
| CPU Model | MediaTek Dimensity 8300 (Octa-Core, 4nm, up to 3.35GHz) |
| GPU | Arm Mali-G615 MC6 |
| RAM | 48GB (12GB + up to 36GB Extended RAM) LPDDR5X |
| ROM | 1TB (UFS) |
| External Storage | T-Flash Card up to 2TB |
| Display Size | 6.78 inches FHD+ IPS Notch-less Punch Display |
| Display Resolution | 1080 x 2460 pixels |
| Screen Refresh Rate | 120 Hz |
| Brightness | 550 cd/m² |
| Contrast Ratio | 1500:1 |
| Rear Camera Quantity | 3 (200MP Main, 64MP Night Vision, 8MP Long Focus) |
| Rear Camera Pixel | 200MP (S5KHP2), 64MP (OV64B), 8MP (Hi847) |
| Front Camera Quantity | 1 (32MP) |
| Front Camera Pixel | 32MP (S5KGD1SP) |
| Thermal Imaging Camera | Tiny2-C Module, 256x192 pixels, 25Hz Refresh Rate |
| Battery Capacity | 11000mAh |
| Charging Power | 66W Fast Charging |
| Charging Interface Type | Type-C |
| SIM Card Quantity | 2 SIM Card (Triple Card Slot: 2 Nano-SIM + 1 TF Card) |
| Cellular | 3G, 2G, 4G, 5G |
| WIFI | Yes (WiFi6E 802.11ax/ac/a/b/g/n) |
| Bluetooth | BT5.4 |
| NFC | Yes |
| Built-in GPS | Yes (GPS, Glonass, Galileo, Beidou L1+L5) |
| Biometrics Technology | Side-Mounted Fingerprint, Face Recognition |
| 3.5mm Headphone Port | No |
| IP Rating | IP68/IP69K |
| Military Standard | MIL-STD-810H |
| Dimensions | 184.9 mm (Height) x 84.0 mm (Width) x 18.0 mm (Thickness) |
| Weight | 1.0 kg (Package Weight) |
| Certification | CE, FCC, UN38.3, MSDS, GMS |
12. Troubleshooting
If you encounter any issues with your DOOGEE S300 Plus Thermal, please refer to the following common solutions:
- Device not powering on: Ensure the battery is charged. Connect the phone to the charger and try powering on again.
- Screen unresponsive: Try restarting the device by holding the power button for an extended period (usually 10-15 seconds) until it reboots.
- Network connectivity issues: Check if your SIM card is properly inserted. Verify that mobile data is enabled and that you have network coverage. Try toggling airplane mode on and off.
- Wi-Fi connection problems: Ensure Wi-Fi is enabled. Forget the network and reconnect, entering the password again. Restart your router if necessary.
- App crashes or freezes: Close the problematic app and reopen it. If the issue persists, clear the app's cache and data in Settings > Apps.
- Battery draining quickly: Reduce screen brightness, disable unnecessary background apps, turn off Wi-Fi/Bluetooth/GPS when not in use. Check battery usage in Settings to identify power-hungry apps.
- Thermal camera not working: Ensure the thermal camera app has necessary permissions. Check for any physical obstructions on the thermal sensor.
For more detailed troubleshooting or issues not listed here, please refer to the comprehensive user manual PDF or contact customer support.
13. User Tips
Based on user feedback, the DOOGEE S300 Plus Thermal is highly regarded for its excellent performance and robust features. Here are some tips to enhance your experience:
- Maximize Durability: While the phone is rugged, avoid unnecessary exposure to extreme conditions or impacts to prolong its lifespan.
- Explore Camera Modes: Experiment with the various camera modes, especially the 200MP main camera for ultra-clear imaging and the 64MP night vision for low-light scenarios.
- Utilize Thermal Imaging: Familiarize yourself with the thermal imaging features for practical applications in work, adventure, or safety.
- Leverage Gemini AI: Explore the Gemini AI features for content creation, information retrieval, code development, and visual understanding to boost your productivity.
- Stay Connected: Make use of the POC Walkie Talkie for instant group communication in appropriate environments.
14. Maintenance
To ensure the longevity and optimal performance of your DOOGEE S300 Plus Thermal, follow these maintenance guidelines:
- Cleaning: Use a soft, lint-free cloth to clean the screen and body of the phone. For stubborn dirt, slightly dampen the cloth with water. Avoid harsh chemicals or abrasive materials.
- Water Exposure: Although waterproof, ensure all ports and covers are securely closed before exposing the phone to water. After water exposure, dry the phone thoroughly, especially the charging port, before charging.
- Temperature: Avoid exposing the phone to extreme temperatures (very hot or very cold) for prolonged periods, as this can affect battery life and internal components.
- Storage: Store the phone in a cool, dry place away from direct sunlight when not in use.
- Software Updates: Regularly check for and install software updates to ensure your device has the latest features, security patches, and performance improvements.
15. Warranty and Support
Your DOOGEE S300 Plus Thermal comes with a warranty card included in the package. Please refer to the warranty card for detailed terms and conditions regarding coverage and duration.
For comprehensive information, including detailed instructions, safety guidelines, and regulatory compliance, please consult the official user manual PDF:
If you require further assistance or have specific questions, please contact DOOGEE customer support through their official channels or the seller's support on the platform where you purchased the device.