1. Introducción
This manual provides essential information for the safe and efficient use of your Ulefone RugKing 4 Pro rugged smartphone. Please read it thoroughly before operating your device.
The Ulefone RugKing 4 Pro is designed for durability and performance, featuring a robust build, a large battery, and advanced camera capabilities, running on Android 15.
2. Contenido del paquete
Verifique que todos los artículos estén presentes en el paquete de su producto:
- Ulefone RugKing 4 Pro Smartphone
- Cargador de corriente CA (100~240 V)
- Cable de datos tipo C a tipo C (100 cm)
- Protector de pantalla de vidrio templado
- Aguja SIM
- Acollador
- Manual de usuario y tarjeta de garantía
- Exclusive Armor Case (pre-installed or included separately)

Image: Contents of the Ulefone RugKing 4 Pro retail package, including the phone, charger, cable, screen protector, SIM tool, lanyard, and armor case.
3. Configuración
3.1. Instalación de la tarjeta SIM y la tarjeta SD
- Localice la bandeja de la tarjeta SIM en el costado del dispositivo.
- Inserte la aguja SIM provista en el pequeño orificio al lado de la bandeja para expulsarla.
- Place your Nano SIM cards and/or TF (SD) card into the designated slots on the tray. Ensure correct orientation.
- Vuelva a insertar con cuidado la bandeja en el teléfono hasta que quede al ras con el cuerpo del dispositivo.
3.2. Encendido inicial
- Mantenga presionado el botón de encendido (generalmente en el lado derecho) hasta que aparezca el logotipo de Ulefone.
- Siga las instrucciones en pantalla para completar la configuración inicial, incluida la selección de idioma, la conexión Wi-Fi y el inicio de sesión de la cuenta de Google.
3.3. Applying the Screen Protector
For added screen protection, carefully apply the tempered glass screen protector following the instructions provided with the protector. Ensure the screen is clean and dust-free before application.
4. Instrucciones de funcionamiento
4.1. Batería y carga
The RugKing 4 Pro features a large 10,200mAh battery for extended use. It supports standard charging via the USB-C port and also offers convenient dock charging (dock charger sold separately).

Imagen: Una explosión view of the Ulefone RugKing 4 Pro highlighting the 10,200mAh battery, alongside an image of the phone charging on an optional dock.
4.2. Pantalla
The device is equipped with a 6.56-inch 120Hz display, offering a smooth and immersive visual experience with 500 nits brightness. This high refresh rate is ideal for browsing, gaming, and streaming.

Image: The Ulefone RugKing 4 Pro displaying a high-speed car racing scene, emphasizing the 6.56-inch 120Hz display and 500 nits brightness.
4.3. Sistema de cámara
Capture moments with the RugKing 4 Pro's versatile camera system:
- Cámara principal de 48 MP: For detailed and clear outdoor photography with an f/1.8 aperture.
- Cámara macro de 2 MP: Discover intricate details of small objects.
- 8MP Front Shooter: Para selfies y videollamadas nítidas.

Image: A close-up of the Ulefone RugKing 4 Pro's rear camera module, highlighting the 48MP main camera, with example photos of a forest path, zebras, and a person.

Image: The Ulefone RugKing 4 Pro's 2MP macro camera, with example close-up photos of a ladybug, a bee, and a dragonfly.

Image: The Ulefone RugKing 4 Pro's 8MP front camera, showing a group of friends taking a selfie outdoors.
4.4. AI Assistant Features
The RugKing 4 Pro integrates AI features for enhanced productivity:
- Ulefone AI Pro: Offers AI recording summary, AI writing assist, Ulefone Screen Search, and AI Calculator.
- Integración de Google Gemini: Seamlessly use Google Gemini, ChatGPT, and Grok for brainstorming, concept clarification, and task streamlining.

Image: Screenshots demonstrating Ulefone AI Pro features including AI Recording Summary, AI Writing Assist, Ulefone Screen Search, and AI Calculator.

Image: Screenshots showing Google Gemini interface on the Ulefone RugKing 4 Pro, illustrating its use for creative tasks and information retrieval.
4.5. Características de durabilidad
The RugKing 4 Pro is built to withstand harsh environments:
- Clasificación IP68 e IP69K: Water and dust resistant, capable of submersion up to 2m for 30 minutes.
- Certificación MIL-STD-810G: Meets military standards for drop resistance up to 2m.
- Corning Gorilla Glass 3: Mayor durabilidad de la pantalla contra arañazos e impactos.
- Water-Lock Mode: Prevents accidental touches when the screen is wet, maintaining visibility and functionality in rainy conditions.

Image: A collage showing the Ulefone RugKing 4 Pro submerged in water, covered in dust, and being dropped, illustrating its IP68/IP69K and MIL-STD-810H certifications.

Image: A collage showing the Ulefone RugKing 4 Pro being used in various wet conditions, such as cycling in the rain, demonstrating the Water-Lock Mode.
4.6. Funciones adicionales
The RugKing 4 Pro includes several practical features:
- Super Torch: A powerful built-in glare flashlight for illuminating dark environments.
- GPS/GLONASS/Beidou/Galileo: Comprehensive navigation system.
- Certificado Widevine L1: Enables high-definition streaming on supported platforms.
- Clave personalizada: Botón programable para acceso rápido a funciones.
- NFC: For Google Pay and other contactless services.
- Desbloqueo facial e identificación de huellas dactilares: Autenticación biométrica segura y conveniente.
- Caja de herramientas para exteriores: Pre-installed apps for outdoor activities.
- FM sin auriculares: Escucha la radio FM sin necesidad de auriculares como antena.

Image: The Ulefone RugKing 4 Pro's Super Torch in use, illuminating a camping tent and various outdoor scenarios.

Image: A visual representation of the Ulefone RugKing 4 Pro's additional features, including 3-card slot, headset-free FM, custom key, NFC, outdoor toolbox, face unlock, fingerprint ID, and multiple navigation systems (GPS, GLONASS, Beidou, Galileo).
4.7. Conectividad de red
The RugKing 4 Pro supports global 4G frequency bands with a 3-card slot design for two Nano SIM cards and one TF card. It is compatible with most carriers supporting GSM, WCDMA, and LTE, such as T-Mobile. Note: Not compatible with AT&T or Cricket.
5. Mantenimiento
To ensure the longevity and optimal performance of your Ulefone RugKing 4 Pro, follow these maintenance guidelines:
- Limpieza: Limpie periódicamente el dispositivo con un paño suave y húmedo.amp cloth. For stubborn dirt, especially after exposure to mud or saltwater, rinse thoroughly with fresh water and ensure all ports are dry before charging or using accessories.
- Actualizaciones de software: Keep your device's software updated to the latest version to benefit from performance improvements, security patches, and new features. Check for updates in Configuración > Sistema > Actualización del sistema.
- Evite temperaturas extremas: Do not expose the phone to extremely high or low temperatures for prolonged periods, as this can affect battery life and internal components.
- Protección portuaria: Ensure the rubber stoppers for the charging port and headphone jack (if applicable) are securely closed when not in use to maintain water and dust resistance.
6. Solución de problemas
If you encounter issues with your Ulefone RugKing 4 Pro, refer to the following common solutions:
- El dispositivo no se enciende: Asegúrese de que la batería esté cargada. Conecte el teléfono al cargador y espere unos minutos antes de volver a encenderlo.
- Problemas de conectividad de red: If your SIM card is not working, ensure it is correctly inserted and that your carrier is supported. Try reinserting the SIM card. If issues persist, contact your carrier for assistance.
- La pantalla no responde: Realice un reinicio forzado manteniendo presionado el botón de Encendido durante aproximadamente 10 a 15 segundos.
- Mal funcionamiento de la aplicación: If an app is not opening or crashing, try clearing its cache and data in Configuración > Aplicaciones > [Nombre de la aplicación] > Almacenamiento, o desinstale y vuelva a instalar la aplicación.
- Waterproof Test Warning: If you intend to make a waterproof test, please tightly plug the stoppers of the earphone jack and charging port, and make sure the card slot is well inserted. After the test, please dry off the phone and make sure it is completely dry before turning on. Otherwise, it may cause speaker issues. If the phone was broken or after destructive test, please do not make the waterproof test.
7. Especificaciones
| Característica | Especificación |
|---|---|
| Sistema operativo | Androide 15 |
| Procesador | Unisoc T7250 de ocho núcleos |
| RAM | Hasta 16 GB (8 GB físicos + 8 GB virtuales) |
| Almacenamiento interno | 256GB ROM (Expandable up to 2TB with SD card) |
| Mostrar | 6.56 Inches, 120Hz Refresh Rate, 500 nits Brightness, Corning Gorilla Glass 3 |
| Cámara principal | 48 MP, apertura f/1.8 |
| Cámara macro | 2MP |
| Cámara frontal | 8MP |
| Capacidad de la batería | 10200 mAh |
| Cargando | USB-C, Supports Dock Charging (dock sold separately) |
| Durabilidad | IP68 & IP69K Waterproof, MIL-STD-810G Drop Resistance (up to 2m), Dustproof |
| Conectividad | 4G LTE Dual SIM, NFC, GPS/GLONASS/Beidou/Galileo |
| Características especiales | Built-in Glare Flashlight (Super Torch), Custom Key, Face Unlock, Fingerprint ID, Outdoor Toolbox, Headset-free FM, Widevine L1 |
| Dimensiones | 6.05 x 3.23 x 0.54 pulgadas |
| Peso | 7.1 onzas |
8. Garantía y soporte
Your Ulefone RugKing 4 Pro comes with a manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions.
For customer service and support, you can contact Ulefone directly or the seller, SMART TECH PHONE, through Amazon's messaging system. For troubleshooting carrier connectivity, activate your SIM card using a carrier-compatible phone, wait for activation confirmation (SMS/4G/5G signal), then reinsert the SIM into your Ulefone device. It should auto-connect. If issues persist, please email the seller for assistance.
You can also join the Ulefone VIP Customer Group on Facebook for exclusive customer service consultation and to connect with other Ulefone enthusiasts.

Image: A card detailing customer service support, including a QR code to join the Ulefone VIP Customer Group on Facebook.
9. Vídeos de productos
Video: Ulefone RugKing 4 Pro Rugged Smartphone Overview. This video demonstrates key features such as the large battery, dock charging, drop resistance, dust resistance, water resistance, camera capabilities, and super torch function in various outdoor settings.
Video: Ulefone RugKing 4 Pro First Hands-on. This video provides a quick hands-on look at the RugKing 4 Pro, showcasing its screen search feature, super torch, water-lock mode, macro camera, main camera, and armor case accessories.





