1. Introduction
This manual provides detailed instructions for the safe and efficient use of your OPPO F31 5G smartphone. Please read this manual thoroughly before operating the device to ensure optimal performance and to prevent damage.
The OPPO F31 5G is a feature-packed smartphone designed for performance and durability, featuring a 6.57" AMOLED display, 50MP main camera, MediaTek Dimensity 6300 chipset, and a 7000mAh battery with 80W flash charging.

Image: OPPO F31 5G smartphone in Cloud Green, showcasing its design from the front and back.
2. What's in the Box
Verify that all items are present in the package:
- Phone Case
- Power Adapter
- SIM Tray Ejector
- Screen Protector
- OPPO F31 5G Smartphone
3. Setup
3.1 Inserting the SIM Card
- Locate the SIM card tray on the side of the phone.
- Insert the SIM tray ejector tool into the small hole next to the tray and press gently until the tray pops out.
- Place your Nano SIM card(s) into the tray with the gold contacts facing down. The OPPO F31 5G supports Dual SIM.
- Carefully reinsert the SIM tray into the phone.
3.2 Powering On and Initial Setup
- Press and hold the Power button until the OPPO logo appears.
- Follow the on-screen instructions to select your language, connect to Wi-Fi, and set up your Google account.
- Configure biometric security features such as Fingerprint Recognition for enhanced security.
4. Operating Instructions
4.1 Display
The OPPO F31 5G features a 6.57-inch AMOLED flexible display with a 93% screen-to-body ratio. It offers a 120Hz adaptive refresh rate for smooth scrolling and gaming, and a 1400-nit peak brightness for clear outdoor visibility. Eye-care technologies, including hardware-level low blue light, are integrated to protect your eyes.

Image: The OPPO F31 5G's 120Hz AMOLED Ultra Bright Display, highlighting vivid clarity and smooth flow.
4.2 Camera
Capture high-quality photos and videos with the pro-grade camera system. The rear setup includes a 50 MP Main Camera and a 2 MP Portrait Camera. The front camera is a sharp 16 MP sensor. Advanced HDR Algorithm Optimization enhances dynamic range and reduces noise, especially in low light. Features like Dual-View Video, Live Photos, and Dynamic Capturing are available for creative content creation.

Image: The OPPO F31 5G's 50MP Ultra-Clear Camera, designed to preserve every detail.
4.3 Performance
The device is powered by the MediaTek Dimensity 6300 chipset and UFS 2.2 storage, ensuring smooth multitasking and gaming. A 4300 mm² VC cooling system is integrated to maintain sustained performance during intensive tasks. Running on ColorOS 15, the system is optimized for 72-month fluency protection.

Image: The MediaTek Dimensity 6300 Mobile Platform, providing smooth and responsive power.

Image: The SuperCool VC System of the OPPO F31 5G, designed to keep the device cool under pressure.
4.4 Battery and Charging
The OPPO F31 5G is equipped with a 7000mAh battery, offering up to 3 days of power on a single charge. It supports 80W Super Flash Charge, allowing for rapid charging even in extreme temperatures (43°C and 0°C). Industry-leading safety mechanisms ensure reliable charging and battery protection.

Image: The OPPO F31 5G's 7000mAh large battery and 80W Flash Charge capability, providing full power in minutes.
4.5 Connectivity
Stay connected with AI LinkBoost 3.0 and Hunter antenna architecture, ensuring stable internet, smoother gaming, and clear calls even in areas with weak signals. Beacon Link 2.0 enables offline peer-to-peer calls within a 210m range. The device supports 5G cellular technology, Bluetooth, Wi-Fi, and NFC.

Image: The OPPO F31 5G featuring AI LinkBoost 3.0 for seamless connectivity, even in challenging environments.
4.6 Durability
Constructed with aerospace-grade aluminum and AGC DT-Star D+ glass, the OPPO F31 5G is IP69/IP68/IP66 certified. It features Military-grade Durability Damage-proof 360° Armor Body, designed to withstand high-pressure water jets, drops, sand, and freezing conditions.

Image: The OPPO F31 5G demonstrating its IP69, IP68, and IP66 water-resistant capabilities, remaining unshaken by water, dust, or dirt.

Image: The OPPO F31 5G showcasing its Military-Grade Shock Resistance, offering military-level strength and everyday protection.
4.7 Operating System (ColorOS 15)
The AI-powered ColorOS 15 includes innovative features such as Smart Document (AI summaries, translations, rewriting), Smart Note (AI-enhanced note-taking), and high-quality scanning. Integrated Google Gemini provides advanced language understanding, content creation, and reasoning.
4.8 Security
The O-Lock anti-theft technology ensures your device instantly locks if stolen, preventing data breaches and blocking unauthorized resets or SIM swaps. Spam call blocking helps ensure every call is secure and meaningful.
5. Maintenance
- Cleaning: Use a soft, lint-free cloth to clean the screen and body. Avoid harsh chemicals.
- Software Updates: Regularly check for and install system updates to ensure optimal performance and security.
- Storage Management: Periodically clear unnecessary files and apps to maintain sufficient storage space.
- Battery Care: Avoid exposing the phone to extreme temperatures. For long-term storage, keep the battery charged to around 50%.
6. Troubleshooting
| Issue | Possible Solution |
|---|---|
| Phone not turning on | Ensure the battery is charged. Connect to the power adapter and try again. If unresponsive, perform a force restart (refer to device-specific instructions for button combinations). |
| Battery drains quickly | Reduce screen brightness, close unused apps, disable unnecessary background processes, and limit location services. Check for apps consuming excessive power in battery settings. |
| Network connectivity issues | Check SIM card insertion. Restart the phone. Verify mobile data or Wi-Fi settings. If issues persist, contact your network provider. |
| Apps freezing or crashing | Clear the app's cache and data in settings. Update the app to the latest version. If the issue continues, uninstall and reinstall the app. |
| Fingerprint sensor not working | Ensure your finger is clean and dry. Re-register your fingerprints in the security settings. Ensure the sensor area is clean. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | OPPO |
| Model | F31 5G |
| Operating System | Android 14 (ColorOS 15) |
| RAM | 8 GB |
| Internal Storage | 128 GB (UFS 2.2) |
| Processor | MediaTek Dimensity 6300 (2, 2.4 GHz) |
| Display Size | 6.57 Inches |
| Display Type | AMOLED |
| Resolution | 1080x2400 pixels |
| Refresh Rate | 120 Hz |
| Peak Brightness | 1400 nits |
| Rear Camera | 50 MP (Main) + 2 MP (Portrait) |
| Front Camera | 16 MP |
| Battery Capacity | 7000 Milliamp Hours |
| Charging | 80W Super Flash Charge |
| Connectivity | 5G, Bluetooth, Wi-Fi, NFC |
| SIM Card Slot Count | Dual SIM (Nano) |
| Water Resistance Level | IP69/IP68/IP66 Certified |
| Biometric Security | Fingerprint Recognition |
| Dimensions | 16.3 x 7.8 x 0.8 Centimeters |
| Weight | 204 Grams |
| Country of Origin | India |
8. Warranty and Support
Warranty Description: The OPPO F31 5G comes with a 12-month warranty on the handset and a 6-month warranty on the adapter and cable from the date of purchase.
Manufacturer Contact Information:
OPPO Mobiles India Pvt Ltd5th FLOOR, Tower B, BUILDING, N-8,
DLF Cyber City, DLF Phase 2,
Gurugram, Haryana 122002
Tel: 18001032777
For further assistance, please visit the official OPPO support website or contact customer service using the provided contact details.





