Kolkata : OPPO India has unveiled the F31 5G Series, the latest addition to its F line-up, promising unmatched durability, smooth performance, and advanced AI tools tailored for India’s climate and lifestyle. The series includes F31 Pro+, F31 Pro, and F31, all positioned as the most durable and smoothest mid-range smartphones under ₹35,000.
Built for India’s Heat and Hustle
The F31 5G Series directly addresses the Indian consumer’s top priority: durability. According to Counterpoint Research, 79% of buyers rank durability as their primary factor. OPPO has responded with a 360° Armor Body featuring a multi-layer airbag structure, aerospace-grade aluminium alloy frame, and AGC DT-Star D+ glass.
The devices are IP66, IP68, and IP69 certified, making them resistant to dust, immersion, and high-pressure water jets up to 80°C. They can withstand tea, coffee, milk, detergent water, and 18 other everyday liquids — a feature designed for delivery riders, shopkeepers, and professionals working in India’s challenging conditions.
Smoothness Under Pressure
To combat India’s heat, OPPO has integrated advanced cooling systems. The F31 Pro+ uses a 5,219 mm² vapour chamber, while the Pro and base models use slightly smaller chambers with expanded graphite layers. This ensures consistent performance even at 43°C ambient temperatures.
Software-level optimisation comes with OPPO’s Dual-Engine Smoothness System, combining the Trinity Engine and Luminous Rendering Engine. Together, they deliver a 72-month fluency certification, guaranteeing smooth performance for six years.
Power and Performance
- F31 Pro+: Qualcomm Snapdragon 7 Gen 3, up to 24GB RAM (12GB physical + 12GB virtual), UFS 3.1 storage.
- F31 Pro: MediaTek Dimensity 7300 Energy, up to 24GB RAM, UFS 3.1 storage.
- F31: MediaTek Dimensity 6300, up to 16GB RAM (8GB physical + 8GB virtual), UFS 2.2 storage.
All models run ColorOS 15 (based on Android 15) with AI optimisations, faster app switching, improved multitasking, and longer-lasting smoothness.
Reliable Connectivity
The F31 Series introduces Hunter Antenna 2.0 with 91.6% frame coverage, TÜV Rheinland-certified performance, and India’s first NetworkBoost S1 chip. Jio has certified the series as the best network performer under ₹35,000.
Features like Outdoor Mode 2.0 prioritise delivery apps, while Glove Mode and Splash Touch ensure usability in rain or with gloves.
Smarter AI and Imaging
Camera capabilities include a 50MP OIS main camera, 2MP depth/monochrome sensor, and a 32MP front camera (16MP on F31). AI features include AI Eraser 2.0, AI Unblur, AI Clarity Enhancer, and AI Reflection Remover.
On the productivity front, AI VoiceScribe transcribes calls in 29 languages, while AI Call Assistant offers live translations in nine Indian languages. OPPO Docs with Gemini AI supports instant summarisation and rewriting of documents.
Long-Lasting Battery
A 7,000mAh battery with bio-inspired electrolyte repair technology ensures 80% health even after 1,800 cycles (five years of use). Charging includes 80W SUPERVOOC Flash Charge (58% in 30 mins), reverse charging, and bypass charging for heat-free gaming.
Stylish Design
- F31 Pro+: Gemstone Blue, Himalayan White, Festival Pink | 6.8-inch AMOLED, 195g, 7.7mm slim
- F31 Pro: Desert Gold, Space Grey | 6.57-inch AMOLED, 190g, 7.9mm slim
- F31: Midnight Blue, Cloud Green, Bloom Red | 6.57-inch AMOLED, 187g, 7.9mm slim
Price and Availability
The OPPO F31 Series will be available from September 19, 2025 across offline stores, OPPO e-store, Flipkart, and Amazon.
- 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
- Up to 10% cashback on SBI, HDFC, Kotak Bank cards
- No-cost EMI up to 6 months, consumer loans up to 8 months
- Free protection for 180 days (accidental, liquid, and screen damage)
- Exchange bonus up to 10%
