1. Introduction
The OUKITEL WP21 is a rugged smartphone designed for durability and high performance. It features a dual-screen design, powerful processor, long-lasting battery, and advanced camera capabilities, making it suitable for various demanding environments and daily use.

Image: Front and rear view of the OUKITEL WP21 Rugged Smartphone, highlighting its robust design and dual-screen feature.
2. Setup
2.1 Package Contents
- OUKITEL WP21 Rugged Smartphone
- 66W Fast Charger
- USB Type-C Cable
- SIM Ejector Tool
- User Manual (this document)
- Warranty Card
Video: An unboxing of the OUKITEL WP21 Rugged Smartphone, showing the phone and its included accessories such as the charger and cables.
2.2 SIM/TF Card Installation
- Locate the SIM card tray on the side of the device.
- Insert the SIM ejector tool into the small hole next to the tray and push gently until the tray pops out.
- Place your Nano-SIM card(s) and/or TF (microSD) card into the designated slots on the tray. Ensure the cards are correctly oriented.
- Carefully reinsert the tray into the phone until it is flush with the device body.

Image: Close-up of the OUKITEL WP21 showing the dual SIM card tray with SIM and TF card slots.
2.3 Initial Charging
Before first use, fully charge your OUKITEL WP21. Connect the provided 66W fast charger to the USB Type-C port at the bottom of the phone. A full charge from 0% takes approximately 59 minutes. The phone supports reverse charging to act as a power bank for other devices.
Video: Demonstrates the OUKITEL WP21 fast charging capability, showing the phone connected to the 66W charger and the battery indicator increasing rapidly.
2.4 Power On/Off
- To Power On: Press and hold the Power button (located on the right side) until the OUKITEL logo appears.
- To Power Off: Press and hold the Power button until the power options menu appears. Select "Power off" and confirm.
3. Operating Instructions
3.1 Main Display
The OUKITEL WP21 features a 6.78-inch FHD+ anti-scratch display with a resolution of 2460x1080 pixels and a 120Hz refresh rate. This high refresh rate provides a smooth visual experience, especially for scrolling and gaming.

Image: The OUKITEL WP21's 6.78-inch FHD+ display showcasing its 120Hz refresh rate during a gaming scenario.
Video: Demonstrates the smooth 120Hz refresh rate of the OUKITEL WP21 display while scrolling through content.
3.2 Rear Display Functions
The unique 1.32-inch rear screen offers quick access to several functions without needing to turn on the main display. You can customize themes and access features such as:
- Time and Date display
- Music playback controls
- Incoming call notifications and answering
- Message notifications
- Battery power check
- Quick camera access for selfies

Image: The OUKITEL WP21's rear screen displaying various functions like time, music controls, and call notifications.

Image: The OUKITEL WP21's rear screen showing multiple interface options and widgets.
3.3 Camera System
The WP21 is equipped with a versatile camera system:
- 64MP AI Main Camera: For high-resolution photos with AI enhancements.
- 20MP Night Vision Camera: Utilizes infrared for clear images in pitch-dark environments.
- 2MP Macro Camera: For detailed close-up shots.
- 20MP Front Camera: Supports beauty selfies and video calls.
Camera modes include Picture, Video, Beauty, 64M (full resolution), Pro, Portrait, GIF, Panorama, and Mono.

Image: Visual representation of the OUKITEL WP21's 64MP main camera and 20MP night vision camera capabilities in different lighting conditions.

Image: Depicts various camera modes available on the OUKITEL WP21, including night vision, main camera, and front camera.
3.4 Performance
The OUKITEL WP21 is powered by the MTK Helio G99 octa-core processor, built on 6nm process technology. It offers 17GB RAM (12GB physical + 5GB virtual, configurable in settings) and 256GB of internal storage, expandable up to 1TB via a TF card. This configuration ensures smooth multitasking and ample storage for applications and media.

Image: Illustrates the MTK Helio G99 processor and memory specifications (17GB RAM, 256GB ROM) of the OUKITEL WP21.

Image: Details the performance improvements of the MediaTek Helio G99 processor in the OUKITEL WP21.
3.5 Battery and Charging
The device is equipped with a 9800mAh large-capacity battery, providing extended usage times:
- Up to 750 hours standby
- Up to 35 hours music playback
- Up to 18 hours continuous video watching
It supports 66W fast charging, allowing a full charge in approximately 59 minutes. The phone also supports reverse charging, enabling it to function as a power bank for other devices.

Image: The OUKITEL WP21 showcasing its 9800mAh battery capacity and 66W fast charging feature.

Image: Details the charging time and various usage durations for the OUKITEL WP21's battery.
3.6 Connectivity and Navigation
The WP21 supports 4G dual SIM dual standby (VoLTE compatible) for global network connectivity. It also includes NFC for contactless payments (Google Pay compatible) and GPS for accurate navigation.
- Supported Frequency Bands: WCDMA: B1/2/4/5/6/8/19; CDMA: BCO/BC1; 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. Please verify carrier compatibility before purchase.

Image: A hand holding the OUKITEL WP21 near a payment terminal, illustrating its NFC capability.

Image: The OUKITEL WP21 mounted in a car, displaying a navigation map, highlighting its GPS functionality.
3.7 Security Features
The device offers multiple security options:
- Fingerprint Unlocking: A side-mounted fingerprint sensor provides quick and secure access.
- Face Recognition: Unlock your device using facial recognition technology.

Image: A visual representation of the OUKITEL WP21's face unlock feature in action.
3.8 Additional Features
- Operating System: Android 12.0
- Compass: Built-in digital compass.
- Pedometer: Track your steps and activity.
- Child Mode: Dedicated mode for restricted usage.
- Game Mode: Optimize performance and block interruptions during gaming.
- ToolBag: A suite of outdoor tools.
4. Maintenance
4.1 Rugged Design
The OUKITEL WP21 is built to withstand harsh conditions, complying with IP68/IP69K and MIL-STD-810H standards. This means it is:
- Waterproof: Resistant to submersion in water.
- Dustproof: Fully protected against dust ingress.
- Shockproof: Designed to endure drops and impacts.
- Temperature Resistant: Operates in extreme temperatures from -40°F to 158°F (-40°C to 70°C).

Image: The OUKITEL WP21 submerged in water, illustrating its IP68 waterproof rating and overall ruggedness.

Image: Highlights the MIL-STD-810H, IP68, and IP69K certifications for the OUKITEL WP21.
4.2 General Care
- Regularly clean the screen and device body with a soft, damp cloth.
- Ensure all port covers are securely closed to maintain water and dust resistance.
- Avoid exposing the device to extreme temperatures beyond its operating range for prolonged periods.
- Do not attempt to disassemble or repair the device yourself, as this may void the warranty and compromise its rugged features.
5. Troubleshooting
If you encounter issues with your OUKITEL WP21, refer to the following common troubleshooting steps:
- Device not powering on: Ensure the battery is charged. Connect the charger and try again.
- Screen unresponsive: Restart the device by holding the power button. If unresponsive, force restart by holding the power button for an extended period (usually 10-15 seconds).
- Connectivity issues (Wi-Fi/Mobile Data): Check network settings. Toggle Wi-Fi/Mobile Data off and on. Restart the device. Ensure SIM card is correctly inserted.
- GPS not working accurately: Ensure location services are enabled. Check for clear sky view. Restart the device.
- Charging issues: Ensure the charging cable and adapter are securely connected and undamaged. Try a different compatible charger and cable. Clean the USB-C port gently if debris is suspected.
- Fingerprint sensor not working: Ensure your finger is clean and dry. Re-register your fingerprints in the settings. Restart the device.
- Apps crashing or freezing: Clear the cache of the problematic app or reinstall it. Ensure the device software is up to date.
6. Specifications
| Feature | Specification |
|---|---|
| Model Name | WP21 |
| Brand | OUKITEL |
| Operating System | Android 12.0 |
| CPU Model | MediaTek Helio G99 |
| CPU Speed | 2.2 GHz |
| RAM Memory Installed Size | 17 GB (12GB + 5GB Virtual) |
| Memory Storage Capacity | 256 GB (Expandable up to 1TB) |
| Standing Screen Display Size | 6.78 Inches |
| Refresh Rate | 120 Hz |
| Rear Display Size | 1.32 Inches |
| Battery Capacity | 9800 Milliamp Hours |
| Charging Time | Approx. 59 minutes (with 66W charger) |
| Main Camera | 64 MP |
| Night Vision Camera | 20 MP |
| Front Camera | 20 MP |
| Ruggedness Standards | IP68, IP69K, MIL-STD-810H |
| Item Weight | 4 Grams (0.141 ounces) |
| Package Dimensions | 9.37 x 9.06 x 1.97 inches |
7. Warranty and Support
OUKITEL provides a one-year free warranty for the WP21 Rugged Smartphone. For any quality problems or technical assistance, please contact OUKITEL official customer service via email. Refer to the warranty card included in your package for specific terms and conditions.





