Remember those frustrating moments when your phone dies right when you need it most? Or when it starts lagging during a crucial video call because of overheating? OPPO’s latest F31 Series might just put those worries to rest forever.
The OPPO F31 Series launched in India on September 15, 2025, featuring F31 Pro+, F31 Pro, and base F31 models with a focus on durability and endurance that’s rarely seen in the mid-range smartphone segment. The range starts at Rs 22,999 and brings some serious firepower to compete with established players.
Revolutionary 7,000mAh Battery Technology Powers All-Day Performance
Massive Capacity Meets Fast Charging Innovation
The star of the show is undoubtedly the massive 7000mAh battery and 80W SUPERVOOC Flash Charge technology across all three variants. This isn’t just about having a big battery – it’s about smart power management that actually works.
The OPPO F31 Pro+ uses a single-cell battery with an equivalent typical capacity of 7000mAh/27.44Wh (Typical value) and 6820mAh/26.74Wh (Rated value), while the OPPO F31 Pro uses a single-cell battery with an equivalent typical capacity of 7000mAh/27.44Wh (Typical value) and 6830mAh/26.78Wh (Rated value).
What makes this even more impressive? With 10W reverse wired charging, the phone can serve as a power bank for emergency charging. Charge for 5 minutes = Watch YouTube for extended periods.
Extreme Temperature Performance That Actually Works
Here’s where things get really interesting. Charging performance stays stable even in extreme temperatures—from scorching 43°C heat to freezing -20°C—thanks to OPPO’s optimised thermal control strategy.
This isn’t just marketing fluff. It has earned top A+ ratings from SGS for maintaining smooth performance under 40°C heat, thanks to stable frame rates. For Indian users dealing with harsh summers and varying climate conditions, this is a genuine game-changer.
Military-Grade Durability Meets Everyday Practicality
Triple IP Certification for Ultimate Protection
The triple IP certifications (IP66, IP68, and IP69) make the devices resistant to dust, immersion, and even high-pressure water jets at temperatures as high as 80°C. The AGC DT-Star D+ glass provides further screen protection.
This level of protection means your phone can handle:
- Heavy monsoon rains
- Dusty construction sites
- Accidental drops in water
- High-pressure cleaning (yes, really!)
These smartphones prioritize rugged durability with 360-degree Armour Body, IP66/68/69 ratings, and military-grade build quality suitable for harsh environments.
Smart Cooling System for Consistent Performance
The phone sports a SuperCool VC system for efficient thermal management, ensuring that even during intense gaming sessions or video calls, performance remains smooth. Performance-wise, the F31 Pro+ 5G stands out with Oppo’s “6 Zeros” ultra-smooth experience, powered by Trinity and Aurora engines.
OPPO F31 Series Specifications and Features
| Feature | OPPO F31 | OPPO F31 Pro | OPPO F31 Pro+ |
|---|---|---|---|
| Processor | MediaTek Dimensity 6300 Energy | MediaTek Dimensity 7300 Mobile Platform | Snapdragon 7 Gen 3 processor |
| Display | 6.57 inches (16.69 cm) display | 6.8-inch AMOLED | 6.79 inches (17.25 cm) display |
| RAM | 8 GB RAM | Up to 12GB | 8 GB /12 GB RAM |
| Battery | 7000 mAh battery | 7000 mAh | 7000 mAh battery |
| Rear Camera | 50 MP + 2 MP Dual Rear Camera | 50MP + 2MP | 50 MP + 2 MP Dual Rear Camera |
| Front Camera | 16 MP Front Camera | 32MP | 32 MP Front Camera |
| Special Features | IP66, IP68, IP69 ratings | NetworkBoost Chip S1 | 360° Armour Body design |
Pricing and Availability Details
Competitive Pricing Across All Variants
The OPPO F31 Series pricing structure shows the brand’s commitment to offering premium features at accessible price points:
- OPPO F31: Starting at Rs 22,999
- OPPO F31 Pro: Expected to be around Rs 35,000
- OPPO F31 Pro+: Priced at Rs. 32,999 for one of its base variants
Where and When to Buy
The OPPO F31 Series will be available across offline stores, OPPO E-store, Flipkart, and Amazon from September 19, 2025. This multi-channel approach ensures easy accessibility for consumers across India.
The staggered pricing strategy puts these devices in direct competition with established mid-range and premium offerings from Samsung, Xiaomi, and Realme.
Market Context: How OPPO F31 Series Stacks Against Competition
H3: Battery Wars in the Mid-Range Segment
While most competitors offer 5,000-6,000mAh batteries, OPPO’s 7,000mAh capacity provides a significant advantage. The closest competition comes from:
- Samsung Galaxy M55: 5,000mAh with 45W charging
- Xiaomi Redmi Note 14 Pro: 5,000mAh with 67W charging
- Realme 13 Pro+: 5,200mAh with 80W charging
Durability Factor Changes the Game
According to Oppo, the phones are resistant to rain, greasy fingers, and extreme conditions that would typically damage other smartphones. This positions the F31 Series uniquely in a market where durability often takes a backseat to flashy features.
The military-grade certification and extreme temperature resistance give OPPO a clear edge over competitors who focus primarily on camera capabilities or gaming performance.
AI and Performance Optimization
This device can have up to 24 GB of RAM, which will support 12 GB virtual RAM. Along with this, a better vapor chamber is also going to be available to keep the device cool, which will prevent the phone from heating up.
This comprehensive approach to performance management sets the F31 Series apart from single-focus competitors.
FAQ
With normal usage, including calls, social media, and video streaming, users can expect 2+ days of battery life. The 80W fast charging means you can get a significant charge in just 5 minutes, making it practical for heavy users who need quick top-ups.
Absolutely. Charging performance stays stable even in extreme temperatures—from scorching 43°C heat to freezing -20°C, which covers the entire range of Indian climate conditions. This means consistent performance whether you’re in Delhi’s summer heat or Shimla’s winter cold.
While not a dedicated rugged phone, the triple IP certifications (IP66, IP68, and IP69) make the devices resistant to dust, immersion, and even high-pressure water jets at temperatures as high as 80°C. This provides near-rugged phone protection in a consumer-friendly design.
Why the OPPO F31 Series Matters for Indian Consumers
The OPPO F31 Series represents a significant shift in smartphone priorities – from flashy features to genuine utility. In a market saturated with camera-focused devices, OPPO has chosen to address real user pain points: battery anxiety, overheating, and device fragility.
These smartphones prioritize rugged durability with 360-degree Armour Body, IP66/68/69 ratings, and military-grade build quality suitable for harsh environments – exactly what Indian consumers need for diverse climate conditions and usage scenarios.
With availability starting September 19, 2025, across multiple channels, OPPO has positioned itself to capture users seeking practical innovation over gimmicky features. In a smartphone market often accused of prioritizing form over function, the F31 Series might just be the function-first hero we’ve been waiting for.
I'm Salim, the creator and tech enthusiast behind this website. My passion for technology has been a lifelong journey, fueled by a deep curiosity about how things work and a desire to explore the latest gadgets and innovations that shape our world.