Ulefone Ulefone Armor 28 Ultra Thermal
Ulefone Armor 28 Ultra Thermal Version User Manual
Model: Ulefone Armor 28 Ultra Thermal
1. Introduction
Welcome to the Ulefone Armor 28 Ultra Thermal Version user manual. This rugged smartphone is designed for durability and high performance, featuring advanced thermal imaging capabilities, a powerful processor, and robust construction. This manual provides essential information to help you set up, operate, maintain, and troubleshoot your device.

Image: The Ulefone Armor 28 Ultra Thermal Version, highlighting its epic performance and frontier technology.
2. What's in the Box
Please check the contents of your package. If any items are missing or damaged, contact customer support.
- Ulefone Armor 28 Ultra Thermal Phone
- AC power charger (100~240V)
- Type-C to Type-C Data cable (100cm)
- Screen Protector (pre-applied or in box)
- SIM Tray Ejector
- Lanyard
3. Product Overview
The Ulefone Armor 28 Ultra Thermal is a robust smartphone designed for demanding environments, integrating cutting-edge technology with extreme durability.
Key Features:
- AI-Powered Thermal Imaging: Features a 640 x 512 resolution, 25Hz refresh rate ThermoVue T2 chip for accurate thermal analysis.
- MediaTek Dimensity 9300+ Processor: 4nm chipset with speeds up to 3.4GHz for powerful and efficient performance.
- Memory & Storage: Up to 32GB RAM (16GB physical + 16GB virtual) and 1TB ROM, expandable up to 2TB via SD card.
- Advanced Camera System: Includes a 50MP 1-inch type IMX989 main sensor (8K video), 50MP ultra-wide/macro lens, 64MP night vision camera with 4 IR LEDs, and a 50MP front camera.
- Dual AMOLED Displays: A 6.67-inch flexible AMOLED main display (120Hz, 2200 nits peak brightness) and a 1.04-inch AMOLED sub-display for quick access and notifications.
- Long-lasting Battery: 5300mAh battery with 120W fast charging (40% in 10 minutes) and 50W wireless charging.
- Rugged Durability: MIL-STD 810G, IP68, and IP69K certified for water, dust, and drop resistance, protected by Corning Gorilla Glass 5.
- Connectivity: Global 5G network support, Wi-Fi 7, Bluetooth 5.4, NFC, IR Blaster, USB 3.2 Gen 2.

Image: Front and rear view of the Ulefone Armor 28 Ultra Thermal Version, showcasing its rugged design and camera module.

Image: An infographic detailing the Ulefone Armor 28 Ultra's leading features, including its processor, thermal imaging, display, storage, and charging capabilities.
4. Setup
4.1. Inserting SIM Cards and SD Card
- Locate the SIM card tray on the side of the phone.
- Use the provided SIM tray ejector tool to open the tray.
- Carefully place your Nano-SIM cards and/or microSD card into the designated slots. Ensure the gold contacts are facing down.
- Gently push the tray back into the phone until it clicks into place.

Image: Illustration of the phone's dual 5G connectivity, Wi-Fi 7 support, and the triple card slot for two SIM cards and one TF (microSD) card.
4.2. Initial Power On and Setup Wizard
- Press and hold the Power button until the Ulefone logo appears.
- Follow the on-screen instructions to complete the initial setup, including language selection, Wi-Fi connection, Google account login, and security settings (fingerprint/face ID).
4.3. Charging the Device
- Connect the provided Type-C cable to the phone's charging port.
- Connect the other end of the cable to the AC power charger and plug it into a wall outlet.
- For wireless charging, place the phone on a compatible 50W wireless charging pad (sold separately).

Image: Visual representation of the phone's 10600mAh battery, highlighting its 120W super flash charging, 50W wireless charging, and reverse charging capabilities.
5. Operating Your Device
5.1. Main Display and Sub-Display
The 6.67-inch AMOLED main display offers vibrant visuals and a smooth 120Hz refresh rate. The 1.04-inch AMOLED sub-display on the rear provides quick access to notifications, music controls, and camera functions.

Image: The phone's 6.67-inch AMOLED main display and the customizable watch face options for the 1.04-inch rear sub-display, including selfie camera controls.
Video: A demonstration of the Ulefone Armor 28 Ultra's sub-display functionality, showing how to interact with its various features.
5.2. Camera Functions
The phone features a versatile camera system:
- 50MP Main Camera: For high-resolution photos and 8K video recording.
- 50MP Ultra-wide/Macro Lens: Capture expansive scenes or detailed close-ups.
- 64MP Night Vision Camera: Utilizes 4 IR LEDs for clear images in low-light or complete darkness.
- 50MP Front Camera: For high-quality selfies and video calls.

Image: An overview of the phone's Ultra Camera system, including its various lenses and capabilities such as 8K video recording and night vision.
5.3. Thermal Imaging
The AI-powered thermal imaging system provides accurate temperature readings and visual heat maps. Access the thermal imaging application to utilize this feature for various inspections and analyses.
Video: A showcase of the Ulefone Armor 28 Ultra Thermal's high-resolution thermal imaging capabilities, demonstrating its clarity compared to other thermal phones.

Image: Detailed information on the phone's AI-powered thermal imaging, including FusionAI Technology, resolution, color palettes, and the SharpenAI Algorithm.
5.4. AI Toolbox
The Ulefone AI Toolbox offers several functions to enhance your experience:
- AI Removal
- AI Background
- AI Digital Human
- AI Photography

Image: An infographic illustrating the phone's memory and storage, along with the Ulefone AI Toolkit's various functions.
5.5. Other Features
- uSmart Expansion Connector: Connect compatible external modules like endoscopes or microscopes.
- Fingerprint Unlock & Face ID: Secure and convenient biometric authentication.
- NFC: For contactless payments and data transfer.
- IR Blaster: Control compatible infrared devices.
- Custom Key: Program a physical button for quick access to a specific function or app.
- Outdoor Toolbox: A suite of utility tools for outdoor activities.

Image: The Ulefone Armor 28 Ultra's ruggedness ratings (P68/IP69K, MIL-STD-810H) and the uSmart Expansion Connector, demonstrating its compatibility with various external tools.
6. Maintenance
To ensure the longevity and optimal performance of your Ulefone Armor 28 Ultra Thermal, follow these maintenance guidelines:
- Cleaning: Wipe the phone with a soft, damp cloth. Avoid harsh chemicals or abrasive materials. For the thermal camera lens, use a lens cleaning cloth.
- Water Resistance: While the phone is IP68/IP69K rated, ensure all port covers are securely closed before exposing it to water. Do not intentionally submerge the phone in corrosive liquids.
- Temperature: Avoid exposing the phone to extreme temperatures (very hot or very cold) for extended periods.
- Charging: Use only the original charger and cable or certified compatible accessories to prevent damage to the battery.
- Software Updates: Regularly check for and install system updates (OTA) to ensure your device has the latest features, security patches, and performance improvements.
7. Troubleshooting
If you encounter issues with your device, refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| Phone does not power on | Ensure the battery is charged. Connect to the charger for at least 10 minutes. If still unresponsive, perform a forced restart by holding the Power button for 10-15 seconds. |
| Poor network signal | Check if SIM card is properly inserted. Move to an area with better network coverage. Restart the phone. Contact your network provider. |
| Thermal imaging not working | Ensure the thermal camera lens is clean and unobstructed. Restart the thermal imaging application or the phone. Check for software updates. |
| Battery drains quickly | Close unused apps running in the background. Reduce screen brightness. Disable Wi-Fi, Bluetooth, GPS when not in use. Check for power-intensive apps in battery usage settings. |
| Apps crashing or freezing | Clear the cache and data of the problematic app (Settings > Apps). Update the app to the latest version. If the issue persists, uninstall and reinstall the app. |
If the problem persists after trying these solutions, please contact Ulefone customer support.
8. Specifications
Detailed technical specifications for the Ulefone Armor 28 Ultra Thermal Version:
| Feature | Specification |
|---|---|
| Model Name | Ulefone Armor 28 Ultra Thermal |
| Operating System | Android 14 (upgradeable to Android 15) |
| Processor | MediaTek Dimensity 9300+ (4nm, up to 3.4 GHz) |
| RAM | 32 GB (16GB physical + 16GB virtual) |
| Internal Storage | 1 TB (expandable up to 2 TB via microSD) |
| Main Display | 6.67 Inches AMOLED, 120 Hz Refresh Rate, 2200 nits Peak Brightness, 1080 x 2460 Resolution |
| Sub-Display | 1.04 Inches AMOLED |
| Main Camera | 50 MP (Sony IMX989 1" sensor), 8K Video Recording |
| Ultra-wide/Macro Camera | 50 MP (117° FOV) |
| Night Vision Camera | 64 MP (OV64B sensor, 4 IR LEDs) |
| Front Camera | 50 MP |
| Thermal Imaging | 640 x 512 Resolution, 25Hz Refresh Rate (ThermoVue T2 chip) |
| Battery Capacity | 5300 Milliamp Hours |
| Wired Charging | 120W Fast Charging |
| Wireless Charging | 50W Wireless Charging, Wireless Reverse Charging |
| Ruggedness | IP68, IP69K, MIL-STD 810G, Corning Gorilla Glass 5 |
| Connectivity | 5G, Wi-Fi 7, Bluetooth 5.4, NFC, IR Blaster, USB 3.2 Gen 2 |
| Dimensions | 6.86 x 3.29 x 0.76 inches |
| Weight | 10.6 ounces (301 Grams) |
9. Warranty and Support
Ulefone provides a 12-month manufacturer warranty service in the US for the Armor 28 Ultra Thermal Version. For any questions, technical assistance, or warranty claims, please contact Ulefone customer support through their official channels or visit their website.
For more information and support, you can visit the Ulefone Store on Amazon.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.

