OPPO India has introduced the F31 5G Series, the latest addition to its popular F line, tailored to meet the increasing demand for durability and smooth performance in India. This series includes three models—F31 Pro+, F31 Pro, and F31—each featuring enhanced builds, long-lasting batteries, improved heat management, and advanced connectivity. The F31 5G Series is marketed as the most robust and smooth smartphone range available for under INR 35,000 in India. A Counterpoint Research survey indicates that 79% of consumers prioritize durability when purchasing smartphones, with over half admitting to frequently dropping their devices. The F31 5G Series directly addresses these concerns.
The phones are designed with a 360° Armor Body, incorporating a multi-layer airbag structure to protect internal components from impacts. Furthermore, the aerospace-grade AM04 aluminum alloy frame is 10% stronger than the previous model, while the AGC DT-Star D+ glass enhances screen protection. The devices boast triple IP certifications (IP66, IP68, and IP69), making them resistant to dust, water immersion, and high-pressure water jets at temperatures up to 80°C. In real-world scenarios, this means that users such as delivery riders caught in the rain, shopkeepers with greasy hands, or traders navigating crowded markets can rely on their phones to operate effectively.
Additionally, the F31 is resistant to 18 common liquids including tea, coffee, milk, and detergent water, showcasing its suitability for Indian conditions. Overheating is a prevalent issue; 41% of Indian users report it as a significant concern. The F31 5G Series addresses this with a sophisticated thermal design. The Pro+ model features a 5,219 mm² vapor chamber, while the Pro and base models utilize chambers measuring 4,363 mm² and 4,300 mm², respectively, each paired with expanded graphite layers. This configuration sustains performance even in the extreme Indian summer heat, where temperatures can soar to 43°C. At the software level, OPPO’s Dual-Engine Smoothness System—comprising the Trinity Engine and the Luminous Rendering Engine—ensures fluid app transitions.
These attributes support OPPO’s 72-Month Fluency Certification, promising steady performance for up to six years. This allows a delivery partner to smoothly navigate Google Maps, take a WhatsApp call, and quickly switch to a UPI payment app without delay or crashes. The F31 Pro+ is powered by the Qualcomm Snapdragon 7 Gen 3, built on TSMC’s 4nm process. It features a 2.63GHz Cortex-A715 Prime core, three 2.4GHz Cortex-A715 performance cores, and four 1.8GHz Cortex-A510 efficiency cores. The Adreno 720 GPU and Qualcomm AI Engine provide a 60% improvement in performance per watt compared to earlier models. It supports up to 24GB of RAM (12GB physical + 12GB virtual) and UFS 3.1 storage.
The F31 Pro utilizes the MediaTek Dimensity 7300 Energy 4nm chipset with a combination of four 2.5GHz Cortex-A78 cores and four Cortex-A55 cores, along with the Mali-G615 MC2 GPU, also supporting up to 24GB RAM (12GB physical + 12GB virtual) and UFS 3.1 storage. The F31 is equipped with the Dimensity 6300 6nm chipset featuring two 2.4GHz Cortex-A76 cores, six 2GHz Cortex-A55 cores, and the Mali-G57 MC2 GPU. This range ensures that whether users are gaming for extended periods, streaming videos, or running productivity apps, the devices maintain consistent performance without overheating. All three models operate on ColorOS 15, which includes OPPO’s Dual-Engine Smoothness System.
The Trinity Engine optimizes CPU cache and algorithms to minimize unnecessary spikes, resulting in a 22% enhancement in overall smoothness, a 26% reduction in installation times, and improved battery efficiency. The Luminous Rendering Engine, which is the first parallel animation system on Android, synchronizes transitions at the system level to prevent stutters during multitasking. Collectively, these features strive for what OPPO describes as “six zeros”: no lag, latency, flicker, crashes, mislaunches, or freezes with High-Speed Continuous Application Launch. Users toggling between apps like Maps, WhatsApp, YouTube, and Camera will experience seamless performance. A delivery rider managing navigation, a food delivery app, and Instagram simultaneously will not encounter unexpected app closures.
The F31 Series’ adaptive heat strategy also increases throttling thresholds from 42°C to 45°C, ensuring devices remain responsive in summer. Features such as storage defragmentation, intelligent preloading, and enhanced touch response contribute to sustained smoothness over six years. Additionally, a one-click rejuvenation tool can restore near-factory performance. Connectivity is essential in India’s densely populated urban areas. Building on the Hunter Antenna Architecture from the F29, the F31 introduces Hunter Antenna 2.0, which offers 91.6% frame coverage compared to the standard smartphone average of 50–70%, along with India’s inaugural NetworkBoost S1 chip. This system, certified by TÜV Rheinland, enhances signal strength by 300%.
Jio has verified that the F31 5G Series excels as the best network performer within the ₹35,000 price bracket, ensuring dependable calls, UPI transactions, and live navigation. For delivery personnel and drivers, Outdoor Mode 2.0 features Order Rush Boost, which prioritizes delivery applications like Zomato and Blinkit, as well as App Keep-Alive to prevent critical apps from closing. Glove Mode and Splash Touch enable operation with gloves or wet hands. The series includes a 50MP OIS main camera, a 2MP Monochrome camera, and a 32MP selfie camera (16MP on the base F31), supporting 4K video and underwater photography without needing a case.
AI functionalities include AI Eraser 2.0 for object removal, AI Unblur for moving images, AI Reflection Remover to eliminate glare, and AI Clarity Enhancer for clearer zoomed-in shots. For productivity, AI VoiceScribe transcribes and translates calls and meetings in 29 languages, while AI Call Assistant provides live translations with subtitles or speech in nine regional languages. OPPO Docs, utilizing Gemini AI, can instantly summarize or rewrite documents for both students and professionals. The F31 Series features a 7,000mAh battery equipped with bio-inspired electrolyte repair technology, retaining 80% capacity after 1,800 cycles, equivalent to five years of daily use.
This means a delivery person can complete a double shift, a trader can manage digital payments throughout the day, and a professional can work late without the need for frequent recharging. Charging technology includes 80W SUPERVOOC Flash Charge, allowing the battery to reach 58% in just 30 minutes and a full charge in slightly over an hour. Reverse charging is available for powering accessories or other devices, while bypass charging minimizes heat during gaming and streaming by powering the device directly during charging. The F31 Pro+ is available in Gemstone Blue, Himalayan White, and Festival Pink, weighing 195g and measuring 7.7mm in thickness, featuring a 6.8-inch flat AMOLED display with a 93.5% screen-to-body ratio.
The F31 Pro comes in Desert Gold and Space Grey, weighing 191g and 190g respectively, and measuring just 7.9mm thin, with a 6.57-inch flat AMOLED display. The F31 is offered in Midnight Blue, Cloud Green, and Bloom Red, each weighing 187g and measuring 7.9mm thin, with a 6.57-inch flat AMOLED display and an under-display fingerprint sensor. The OPPO F31 Series will be available at offline stores and on the OPPO E-store, Flipkart, and Amazon starting September 19, 2025. The pricing is as follows: F31 Pro+ 5G: INR 32,999 (8+256GB) and INR 34,999 (12+256GB); F31 Pro 5G: INR 26,999 (8+128GB), INR 28,999 (8+256GB), and INR 30,999 (12+256GB); F31 5G: INR 22,999 (8+128GB) and INR 24,999 (8+256GB), available from September 27.
Customers can benefit from various offers such as bank discounts or exchange bonuses for pre-booking and first-day buyers, which will lower effective prices across all models. Additionally, there is a 180-day protection plan for accidental damage, liquid damage, and screen damage. OPPO India is also offering up to 10% instant cashback on SBI, HDFC, and Kotak Bank credit cards, along with no-cost EMI options for up to six months and consumer loans for up to eight months. Zero down payment schemes and up to a 10% exchange bonus are also available.