New Delhi [India], September 17: OPPO India has unveiled its F31 5G Series, the latest addition to its popular F line-up, engineered to deliver durability, heat management, and long-lasting performance. The range includes three models—F31 Pro+, F31 Pro, and F31—priced under ₹35,000, with sales beginning from September 19.

Built for Indian conditions

Durability is central to the F31 5G series. Each device features a 360° Armor Body with a multi-layer airbag design, an aerospace-grade aluminium alloy frame that is 10% stronger than its predecessor, and AGC DT-Star D+ glass. The models are triple-certified IP66, IP68, and IP69, offering resistance against dust, immersion, and high-pressure water jets at up to 80°C.

The phones also withstand 18 everyday liquids including tea, coffee, and detergent water—features designed for Indian environments.

Advanced thermal design

Overheating remains a top consumer complaint in India. The F31 Pro+ comes with a 5,219 mm² vapour chamber, while the Pro and F31 models use slightly smaller chambers. These work with expanded graphite layers to keep temperatures stable, even during extended use in summer conditions.

OPPO has introduced its Dual-Engine Smoothness System, a combination of the Trinity Engine and Luminous Rendering Engine, aimed at reducing lag, crashes, and throttling. The devices also carry OPPO’s 72-Month Fluency Certification, guaranteeing consistent performance for six years.

Hardware and performance

  • F31 Pro+: Powered by Qualcomm Snapdragon 7 Gen 3, with up to 24GB RAM (12GB physical + 12GB virtual), Adreno 720 GPU, and UFS 3.1 storage.
  • F31 Pro: Runs on MediaTek Dimensity 7300 Energy, with up to 24GB RAM and UFS 3.1 storage.
  • F31: Features MediaTek Dimensity 6300, with up to 8GB + 256GB storage.

All models run ColorOS 15 (based on Android 15) and include AI-driven performance optimisations.

AI and camera features

The series introduces several AI tools such as AI Eraser 2.0, AI Reflection Remover, and AI VoiceScribe for live transcription and translation in 29 languages. Cameras include a 50MP OIS main shooter across all models, with the Pro and Pro+ offering a 32MP selfie camera and the base F31 featuring a 16MP front lens.

Battery and charging

Each model houses a 7,000mAh battery, designed to retain 80% capacity after 1,800 cycles. OPPO’s 80W SUPERVOOC Flash Charge powers the device to 58% in 30 minutes. Reverse charging and bypass charging are also supported.

Connectivity upgrades

The F31 Series comes with Hunter Antenna 2.0 and India’s first NetworkBoost S1 chip, improving signal strength by up to 300%. Jio has certified the phones as top network performers in their price category.

Price and availability

  • F31 Pro+ 5G: ₹32,999 (8+256GB), ₹34,999 (12+256GB)
  • F31 Pro 5G: ₹26,999 (8+128GB), ₹28,999 (8+256GB), ₹30,999 (12+256GB)
  • F31 5G: ₹22,999 (8+128GB), ₹24,999 (8+256GB), available from September 27

Launch offers include up to 10% cashback on select bank cards, no-cost EMI options, and free accidental and screen damage protection for 180 days.

Conclusion

With the F31 5G Series, OPPO India has focused on delivering durability and long-term smoothness, two major concerns for Indian consumers. Positioned under ₹35,000, the series blends flagship-grade design, advanced thermal solutions, and AI productivity features, targeting both professional and lifestyle users.