1. Overview
The Ulefone Armor X31 is a robust 4G rugged smartphone designed for durability and performance in challenging environments. It features a powerful MediaTek Helio G91 processor, a versatile camera system including night vision, a large 6.56-inch HD+ display protected by Corning Gorilla Glass, and a massive 6050mAh battery. This device is built to withstand water, dust, and drops, making it suitable for outdoor enthusiasts and professionals alike. It operates on Android 14, offering a smooth and secure user experience.

Figure 1: Ulefone Armor X31 4G Rugged Smartphone, showcasing its front display and rear camera module with a rugged design.
2. What's in the Box
- Ulefone Armor X31 Smartphone
- AC power charger (100~240V)
- Type-C to Type-C Data cable (100cm)
- Screen Protector (pre-applied or in box)
- SIM Tray Ejector
- Lanyard
- User Manual (this document)

Figure 2: All items included in the Ulefone Armor X31 retail packaging, including the phone, charger, cable, screen protector, SIM ejector, and lanyard.
3. Product Features
3.1 Processor and Memory
The Armor X31 is powered by a MediaTek Helio G91 2.0GHz 8-core CPU, built on a 12nm chipset, ensuring efficient and powerful performance. It comes with 6GB of RAM, expandable up to an additional 6GB of virtual RAM for a total of 12GB, allowing for smooth multitasking. The device offers 128GB of internal storage, which can be further expanded up to 2TB using a TF card. This ample storage capacity is ideal for apps, photos, videos, and other data.

Figure 3: Detailed view of the MediaTek Helio G91 processor, highlighting its 8-core CPU and 12nm advanced process for blazing-fast 4G performance.

Figure 4: Illustration of the Ulefone Armor X31's memory configuration, showing 6GB RAM (plus 6GB virtual RAM) and 128GB ROM, expandable up to 2TB.
3.2 Camera System
The Armor X31 is equipped with a versatile camera setup. The rear features a 48MP main camera (Sony OV48B2Q, f/1.8) for high-resolution photos and a 2MP macro camera for detailed close-up shots. Additionally, it includes a 20MP night vision camera (Sony IMX350, f/1.8) that allows for clear imaging in low-light or complete darkness. The front-facing camera is 16MP, perfect for selfies and video calls. The phone also supports an underwater mode, enabling photography and videography while submerged.

Figure 5: Overview of the Ulefone Armor X31's photography capabilities, including 16MP front camera, 20MP night vision camera, 48MP main camera, and 2MP macro camera, along with various shooting modes.

Figure 6: Examples of images captured using the 20MP Night Vision Camera, demonstrating its effectiveness in dark environments.

Figure 7: Sample photographs taken with the 48MP Ultra-clear Main Camera, illustrating its clarity and detail in various settings.
3.3 Display
The Armor X31 features a 6.56-inch HD+ display with a resolution of 720 x 1612 pixels and a 90Hz refresh rate for smooth visuals. With 800 nits of brightness, the screen remains visible even under direct sunlight. The display is protected by Corning Gorilla Glass 5, providing enhanced durability against scratches and impacts.

Figure 8: Visual representation of the 6.56-inch large display with Corning Gorilla Glass 5, highlighting its 720x1612 resolution, 90Hz refresh rate, and 800 nits maximum brightness.
3.4 Battery
Equipped with a robust 6050mAh battery, the Armor X31 offers extended usage times. It provides up to 336 hours of standby time, 34 hours of talk time, and 25 hours of music playback. The device supports 18W fast charging and features reverse charging, allowing it to act as a power bank for other devices.

Figure 9: Diagram illustrating the 6050mAh massive battery, with estimated usage times for standby, talk, music, and video playback.
3.5 Durability (IP68/IP69K, MIL-STD-810H)
The Ulefone Armor X31 is built to be highly durable, certified with IP68/IP69K ratings and MIL-STD-810H compliance. This means it can withstand submersion in up to 2 meters of water for 30 minutes, endure drops from up to 2 meters, and is fully dustproof, protecting against dirt and sand. Its rugged construction ensures reliability in harsh conditions.

Figure 10: Visual demonstration of the Armor X31's IP68/IP69K and MIL-STD-810H shield, showing its resistance to water, drops, and dust in various scenarios.
3.6 Additional Features
- 120 Lumen Flashlight: An independent, powerful flashlight for illuminating dark environments.
- Google Lens Support: Transforms the camera into a smart tool for translations, image searches, and object identification.
- Widevine L1 Support: Enables streaming of high-definition content from platforms like YouTube, Netflix, and Disney+.
- IR Blaster: Allows the phone to function as a universal remote control for various home appliances.
- Fingerprint Unlock & Face Unlock: Secure and convenient biometric authentication methods.
- NFC: For contactless payments and data transfer.
- Headset-Free FM Radio: Enjoy FM radio without needing headphones as an antenna.
- Custom Key: A programmable button for quick access to frequently used functions.
- Outdoor Toolbox: A suite of useful tools for outdoor activities.
- 3-Card Slot: Supports two SIM cards and one TF card simultaneously.
- GPS + GLONASS + Beidou + Galileo: Comprehensive navigation and positioning capabilities.
- Gloves Mode: Allows for touchscreen operation while wearing gloves.

Figure 11: The independent 120 lumen flashlight, demonstrating its brightness for outdoor use.

Figure 12: The Widevine L1 support feature, enabling high-definition video playback on popular streaming services like Netflix.

Figure 13: The IR Remote Control feature, showing the phone's ability to control various household appliances.

Figure 14: A compilation of additional functionalities including 3.5mm headphone jack, 3-card slot, headset-free FM, Bluetooth 5.2, custom key, NFC, gloves mode, fingerprint ID, and face unlock.
3.7 Accessories
The Ulefone Armor X31 supports a range of specialized accessories to enhance its utility, including a multifunctional protective case, bike/motorcycle phone holder, and sports armband. These accessories are sold separately.
Video 1: Ulefone Armor X31 Series Accessories Showcase. This video demonstrates the various accessories available for the Armor X31, including the bike/motorcycle phone holder (Armor Mount Pro), multifunctional protective case (Armor Case), and sports armband (UAN01), highlighting their practical uses.

Figure 15: The specialized Armor Case, offering 360-degree professional protection for the Ulefone Armor X31. Note: The Armor case mentioned above, combined with a back clip and a carabiner in one set is sold separately.

Figure 16: The accessory ecosystem for the Ulefone Armor X31, featuring the Armor Mount, Armor Mount Pro, and Sports Armband, designed to customize your experience. Note: Armor Mount is sold separately and used with Armor Case only. Armor Mount Pro is sold separately. Sports Armband is sold separately.
4. Setup
- Insert SIM/TF Card: Use the provided SIM tray ejector tool to open the SIM card slot. Insert your Nano-SIM cards and/or a TF card into the designated slots. Ensure the cards are correctly oriented as indicated on the tray. Close the tray securely to maintain water and dust resistance.
- Charge the Device: Connect the Type-C data cable to the phone's charging port and the other end to the AC power charger. Plug the charger into a power outlet. The battery indicator on the screen will show charging status. For optimal battery life, fully charge the device before first use.
- Power On/Off: To power on, press and hold the Power button (located on the right side) until the Ulefone logo appears. To power off, press and hold the Power button, then select 'Power off' from the options on the screen.
- Initial Setup: Follow the on-screen prompts to complete the initial setup, including language selection, Wi-Fi connection, Google account login, and security settings.
5. Operating Instructions
- Navigation: The Armor X31 uses standard Android 14 gestures or navigation buttons (configurable in settings) for home, back, and recent apps.
- Making Calls: Open the Phone app, dial the number, and tap the call icon.
- Sending Messages: Open the Messages app, tap to start a new conversation, enter the recipient's number or select from contacts, type your message, and send.
- Using the Camera: Open the Camera app. Tap the shutter button to take a photo. Swipe left/right to switch between modes (Photo, Video, Night Vision, Macro, etc.). Tap the camera switch icon to toggle between front and rear cameras.
- Connecting to Wi-Fi: Go to Settings > Network & internet > Internet. Turn on Wi-Fi, select your desired network, and enter the password if required.
- Bluetooth Pairing: Go to Settings > Connected devices > Connection preferences > Bluetooth. Turn on Bluetooth, scan for devices, and select the device you wish to pair with.
6. Maintenance
- Cleaning: Use a soft, lint-free cloth to clean the screen and body. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
- Water Resistance: Ensure all port covers (charging port, SIM tray) are securely closed before exposing the phone to water. While the phone is water-resistant, avoid intentional submersion in corrosive liquids or extreme temperatures. If the phone gets wet, dry it thoroughly before charging.
- Temperature: Operate the device within recommended temperature ranges (typically 0°C to 35°C). Extreme temperatures can affect battery life and device performance.
- Storage: When storing the device for extended periods, keep it in a cool, dry place and charge the battery to about 50% to prevent deep discharge.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone does not power 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. |
| Cannot connect to network | SIM card issue; Network settings; Out of service area | Reinsert SIM card; Check network settings (Settings > Network & internet > Mobile network); Move to an area with better signal. |
| Battery drains quickly | Too many background apps; High screen brightness; Frequent use of power-intensive features | Close unused apps; Reduce screen brightness; Disable Wi-Fi/Bluetooth/GPS when not in use; Check battery usage in Settings > Battery. |
| Touchscreen unresponsive | Temporary software glitch; Screen protector interference | Restart the phone; Remove and reapply screen protector; If issue persists, contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | Armor X31 |
| Operating System | Android 14 |
| CPU Model | MediaTek Helio G91 |
| CPU Speed | 2 GHz |
| RAM Memory Installed Size | 16 GB (6GB physical + up to 6GB virtual) |
| Memory Storage Capacity | 128 GB (expandable up to 2TB via TF card) |
| Screen Size | 6.56 Inches |
| Resolution | 720 x 1612 |
| Refresh Rate | 90 Hz |
| Battery Capacity | 6050 Milliamp Hours |
| Phone Talk Time | 34 Hours |
| Product Dimensions | 6.84 x 3.23 x 0.54 inches |
| Item Weight | 10.6 ounces (301 Grams) |
| Color | Green |
| Connectivity Technologies | Bluetooth, Infrared, NFC, USB, Wi-Fi |
| Special Features | Dual SIM, Rugged Body, Supports USB OTG, Versatile LED Light, Water Resistant |
| Audio Jack | 3.5 mm |
| Manufacturer | Ulefone |
9. Warranty and Support
Ulefone provides a 12-month manufacturer warranty service in the US for the Armor X31. For any questions regarding the product, technical assistance, or warranty claims, please contact Ulefone customer support through their official channels or the seller from whom the product was purchased. Detailed contact information can typically be found on the Ulefone official website or within the product packaging.





