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India’s Most Durable Smartphone? OPPO F31 Series 5G Goes on Sale

By News18,Studio18

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India’s Most Durable Smartphone? OPPO F31 Series 5G Goes on Sale

Let’s be honest: there’s a part of us that yearns for the phones our parents used. The kind that had been dropped so often that your dad could put everything back together with his eyes closed. Sure, it was dented and bruised, but it worked.
Of course our phones today are far superior in terms of functionality. But durability? Drop them once, and you’re left with spiderwebbed glass. Got caught in the rain? Say goodbye to touchscreen responsiveness. Even something as simple as greasy hands while flipping between apps can turn your expensive device into a glitchy, frustrating mess.

The fear of your everyday ruining your device is real. In Counterpoint Research’s India Smartphone Durability Consumer Study (July-Aug 2025), 78% of users avoid using their phones near water or in extreme heat out of fear of damage, 67% have had to repair or replace a phone due to physical damage, and repair spends stack up fast: 42% pay ₹2,001-5,000, 21% pay ₹5,001-10,000, and 8% end up over ₹10,001.

That’s not just inconvenient. It’s expensive, stressful – and if you’re one of India’s 450 million working professionals and gig workers or a student whose primary device is their phone – it’s downright disruptive.

Enter the OPPO F31 Series 5G: a trio of smartphones engineered not just to survive, but to thrive in India’s real-world chaos. Whether you pick the flagship-grade OPPO F31 Pro+ 5G, the everyday-powerhouse, or the budget-smart OPPO F31 5G, every model delivers military-grade toughness, triple IP protection, 18-liquid resistance, 5-year battery promise, and smooth, lag-free performance. These aren’t flashy, gimmicky phones. These are the ones built to show up, every single day – and take a beating while doing it.

But, they look nothing like rugged phones. In fact, they’re some of the most stylish devices OPPO has ever shipped.

Tough Enough for India

When OPPO says the OPPO F31 Series 5G is “built for India,” they mean built for our weather, our streets, our chaos. These phones are certified beasts – engineered to survive the stuff most phones tap out from.

Triple IP Certification:
IP66, IP68, and IP69. That means dust storms, high-pressure jets at 80°C, and full submersion up to 1.5 meters? No problem.

18-Liquid Resistance:
Water is only the beginning. The F31 Series handles tea, coffee, coconut water, beer, detergent, steam, muddy puddles – basically, every spill that would wreck a normal phone.

360° Armour Body:
This is where the design flex really shines. Military-tested (MIL-STD-810H-2022), with an Airbag-style multi-layer cushioning system that protects everything inside – from the battery to the camera.

Aerospace-Grade AM04 Alloy:
Think of this as the phone’s roll cage. OPPO upgraded the motherboard cover to AM04 aluminium, which is 10% stronger than last gen (AM03) and conducts heat better. Translation: more drop resistance when life happens, and steadier performance when you’re shooting, streaming, or navigating in peak summer.

Drop Resistance up to 1.8 meters
That’s as high as Chris Hemsworth’s (or, if you prefer, Thor’s) nose. Whether it falls on marble, granite, or a steel drum, the F31 Series is built to shrug it off, and walk away. How so? A multi-layer “Airbag” design protects critical components (camera, speakers, battery, and vibration motors) by shielding them with foam and silicone pads that act as shock absorbers.
Superhero vibes? Check.
Water-Resistant Components and Speaker Drainage System
Even the mic, speakers, and SIM tray are sealed using aerospace-inspired membranes and ribbed silicone layers – designed to let air through, but keep liquids out. Got water in your speaker? The built-in Speaker Drainage system will literally shake it out with pulsating sound waves.

This isn’t just waterproofing. It’s armor for everyday life.

Flagship Looks, Field-Ready Build

Phones this tough usually look like tanks. Not the OPPO F31 Series 5G. On this one, OPPO has pulled off something rare: premium aesthetics with rugged bones.

The OPPO F31 Pro+ 5G comes in Gemstone Blue, Himalayan White, and Festive Pink – each finished with OPPO’s Glow texture for a subtle shimmer. It weighs in at just under 195g and has an enviable profile: 7.8mm or thinner. The OPPO F31 Pro 5G takes the refined route, with Desert Gold and Space Grey – both elegant, both under 8mm thin. The OPPO F31 5G comes in Midnight Blue, Cloud Green, and Bloom Red – all bold, expressive, and under 185g.

Across the lineup, you’re not just getting durability – you’re getting displays that are genuinely flagship-grade. Every phone in the F31 Series features a 120Hz AMOLED screen with FHD+ resolution and support for 1.07 billion colours, so content looks rich, smooth, and true-to-life. The OPPO F31 Pro+ 5G boasts a 6.8-inch flat AMOLED display, while the OPPO F31 Pro 5G and OPPO F31 5G come with a very respectable 6.5-inch flat AMOLED display. A 93.5% screen-to-body ratio to maximize your view, while scratch-resistant glass keeps these devices looking pristine.

The OPPO F31 Pro+ 5G takes it up a notch with 1600 nits peak brightness, making it easy to read even under harsh sunlight. The OPPO F31 Pro 5G and OPPO F31 5G follow closely with 1400 nits, still well above most phones in the segment. And because OPPO is thinking long-term, all models include 2160Hz high-frequency PWM dimming – reducing flicker at low brightness to minimize eye strain during late-night scrolling or long study sessions.

This thoughtfulness in design doesn’t stop at visuals. The OPPO F31 Series 5G comes with stereo dual speakers powered by Ultra Volume Mode, which cranks audio up to 300% louder than normal without distortion. Whether you’re watching reels, blasting playlists, or taking calls in a noisy street, the sound comes through clear, crisp, and surprisingly punchy.

Phones this slim, this stylish, and this tough are rare. With the OPPO F31 Series 5G, OPPO makes sure you don’t have to choose between strength and sophistication.

Performance That Doesn’t Flinch

So, we know they’re tough. We know they’re good looking. But do they compete effectively on performance?

Absolutely, and then some.

Let’s start with the OPPO F31 Pro+ 5G, the most powerful phone in the lineup. It’s built on a 4nm flagship process, powered by the Snapdragon 7 Gen 3 chipset. This platform combines an 8-core Kryo CPU, a next-gen Adreno GPU, and a Hexagon NPU to create one of the most intelligent and power-efficient processors in its class. Paired with OPPO’s Dual Engine Smoothness System, it keeps everyday performance snappy – think 26% faster app installs and silky-smooth UI transitions even under load.

At the user level, that means faster boot-ups, ultra-responsive multitasking, and console-grade visuals. Want to edit 4K video on your phone? Done. Game at high frame rates with zero lag? Easy. The Adreno Frame Motion Engine doubles frame rates without draining more battery, while the Qualcomm AI Engine delivers 60% better AI performance per watt – powering everything from real-time photo enhancement to smarter background processing. All of this runs at a blazing 2.63GHz, with a 15% speed boost and 50% better frame rates compared to the last gen.

Plus, if you’re juggling work and personal life, the 5G Dual-SIM Dual-Active (DSDA) support means you can use two SIMs (5G+5G or 5G+4G) at the same time – all without compromising speed, reliability, or latency. Add in the Snapdragon X63 Modem-RF system, and you’ve got multi-gigabit connectivity that stays strong in crowded areas, trains, or marketplaces.
Move to the OPPO F31 Pro 5G, and you’re still getting that same flagship-level process – 4nm architecture, 8-core CPU, and a powerful MediaTek NPU 655 for AI-enhanced visuals and background tasks. The engine behind it all is the MediaTek Dimensity 7300 Energy platform, a powerhouse built for everyday multitasking and real-time performance. Clocking in at 2.5GHz, this chip is no slouch: it delivers 20% better energy efficiency and a 20% FPS boost over the previous generation. Whether you’re on back-to-back Zoom calls, toggling between heavy apps, or gaming on the side, the MediaTek HyperEngine optimisations make sure you stay smooth, stable, and responsive.

Then there’s the OPPO F31 5G, the budget-smart member of the trio – but don’t let the price fool you. It runs on the MediaTek Dimensity 6300 Energy platform, built on a 6nm process that brings solid, everyday muscle with an 8-core ARM CPU and Mali GPU that’s 50% faster than its predecessor. Clock speeds peak at 2.4GHz, and the improved efficiency makes it ideal for users who want reliability without battery anxiety. It’s the kind of device that can handle WhatsApp, YouTube, and GPS navigation – all at once – without stutter or slowdown.

Each phone in the OPPO F31 Series 5G is tailored for a different user, but they all bring one thing in common: consistent, responsive, real-world performance. Whether you’re a creator, student, shopkeeper, gig worker, or weekend gamer, these phones keep up – come rain or shine.

Built to Last, Literally: 7000mAh, 80W SUPERVOOC, 72-Month Fluency Certification

Even the toughest phones degrade… right?

OPPO knows that in India, a phone isn’t just a device. It’s a lifeline. For delivery partners weaving through traffic, ride-share drivers navigating peak-hour chaos, and gig workers running their entire day from a 6-inch screen – downtime just isn’t an option. So they designed the OPPO F31 Series 5G to stay ahead.

Let’s start with the battery. The OPPO F31 Series 5G packs a massive 7000mAh battery – one of the largest in its segment – designed to last not just a day, but often two, even under heavy usage. OPPO isn’t just throwing in size for show; this battery is built for 5 years of daily use. No more babysitting your phone, no more charging anxiety.

And when you do need to top up? You’ve got 80W SUPERVOOC Flash Charge that gets you from 0 to 100% in 61 minutes. In typical use, you’ll see 0-58% in just 30 minutes, which is often all you need. Need a quick boost between gigs? A 5-min charge gets you to 14%. However, if you do have a few minutes extra and want to game while charging, the bypass charging feature keeps power routed directly to the motherboard, avoiding battery heat-up entirely. This means lower temps, smoother performance, and longer battery health over time.

And speaking of heat, OPPO’s 5,219mm² SuperCool VC System keeps the OPPO F31 Series 5G thermally balanced and stable up to 45°C, so summer heat doesn’t slow you down. Whether you’re tracking live orders on Swiggy, using Maps for long-haul rides, or running Google Translate on the fly, your phone stays cool, stable, and smooth.

Then there’s long-term fluency – a promise most brands wouldn’t dare make. OPPO guarantees that the OPPO F31 Series 5G will stay smooth for at least 72 months. That is 6 years of no stutters, no lag spikes, no “my phone’s gotten slow”. And if your phone ever starts to feel a bit bogged down? Just tap the One-Tap Rejuvenation feature, which optimizes RAM, clears junk, and gets things snappy again without a full reset.

In short, this isn’t a phone you’ll need to replace in a year or three, or even five. It’s a phone that’s been tested to survive and perform for the long haul. Just like the people it’s built for.

AI That Helps, Features That Fit

Power and durability are one thing. But what makes the OPPO F31 Series 5G stand out is how smart it is: how it quietly takes everyday friction out of your life. Because let’s be real: it’s not just about having the strongest hardware. It’s about how the phone actually helps you through the day.

Take AI VoiceScribe. Whether you’re a student trying to capture lecture notes, a delivery partner taking instructions from a client, or a professional jumping between calls, VoiceScribe instantly transcribes speech into neat, readable text – in over 30 languages. It even translates in real time. Imagine being able to talk to a customer in Hindi, and seconds later, have it appear in English or Tamil. That’s the kind of AI that actually matters.

Or AI Call Translator – a godsend for anyone dealing with customers, colleagues, or friends who don’t speak the same language. Calls are interpreted live, with subtitles on screen or even voice dubbing. Suddenly, conversations that used to be awkward are smooth, natural, and barrier-free.

Then there’s Outdoor Mode 2.0, designed specifically for India’s gig economy. For ride-hailing drivers, delivery riders, and couriers, it offers a suite of optimisations tuned to real-world conditions. It boosts brightness so your screen stays visible even under the afternoon sun, and amplifies alerts so you don’t miss time-sensitive updates while on the move. Popular rider apps like Zomato, Swiggy, and Blinkit can even be pinned to your home screen for instant access. And with Order Rush Boost, the phone prioritises data and bandwidth for rider apps, reducing latency and increasing order acquisition speed. Meanwhile, App Keep-Alive ensures these apps remain active in the background, so you’ll never miss a delivery request just because your phone decided to sleep. And with Glove Mode and Splash Touch, the screen remains responsive with gloves up to 5mm thick and even with wet hands – ideal for when you’re out and about in the rain and the cold.

With India’s growing phone theft problem, OPPO gives security the centrestage with OPPO Lock, a remote lockdown system that safeguards both your data privacy and the physical security of your device. If your phone is ever lost, you can contact OPPO customer support to instantly lock it down. While locked, the system prevents forced shutdowns, USB data theft, firmware flashing, and even disables NFC. It also activates two-step verification the moment a SIM card is ejected. In other words, even if your phone is stolen, your data, money, and identity stay locked tight. For anyone who stores payments, contacts, or business data on their phone – which, let’s face it, is all of us – that kind of protection is priceless.

And finally, there’s Google Gemini integration. Summarise documents, set reminders, draft replies – it’s like having an AI assistant built into your everyday apps. It’s a genuine productivity boost, saving you precious minutes when life is already moving fast.

All of this runs on ColorOS 15, backed by two years of OS updates and three years of security updates keeping your phone experience fresh and secure over time.

In short, the OPPO F31 Series 5G doesn’t just power through your day – it lightens your load.

Cameras That Can Swim

While durability is the OPPO F31 Series 5G’s headline, OPPO hasn’t cut corners on creativity. In fact, this lineup might just be one of the most versatile camera systems you’ll find in this segment.

The OPPO F31 Pro+ 5G and OPPO F31 Pro 5G both come equipped with a 50MP main camera with Optical Image Stabilisation (OIS), using the OmniVision 50D40 sensor paired with an f/1.8 aperture lens. Add to that 1–10x zoom and the ability to shoot 4K video at 30fps, and you’ve got a setup that handles everything from crisp low-light photography to smooth, cinematic video. Even when you’re riding pillion on a bumpy road, OIS keeps your footage steady; and when you’re shooting at night, exposures stay longer and crisper without turning light into streaks. Supporting the main sensor is a 2MP monochrome camera, while the front gets a 32MP GalaxyCore 32E2 selfie camera – perfect for vloggers, video calls, or just capturing yourself at your best.

The OPPO F31 5G also punches well above its weight. Its 50MP main sensor with OIS and f/1.8 aperture captures the same kind of flagship-level clarity, while the 16MP Sony IMX480 front camera ensures selfies and video calls look sharp and natural. A 2MP portrait lens adds depth effects, making portraits pop without over-processing.

But here’s the killer feature: the F31 Series is the only lineup in its class rated IP68 and IP69, making it tough enough to double as an underwater camera. You can literally film 4K video while submerged up to 1.5 meters for 30 minutes—no case, no hassle, no fear.

And when it comes to editing, OPPO’s AI suite turns the F31 Series into a pocket-sized creative studio. Features like AI Best Face swap in everyone’s best expression for group photos, while AI Eraser 2.0 wipes out photobombers and clutter with a single tap. Tools like AI Clarity Enhancer and AI Unblur salvage shots that would normally go to waste, while AI Reflection Remover fixes glass glare or mirror weirdness. Even video gets a boost – Ultra-Clear Frame Export lets you pull crisp stills straight from your footage.

This is content creation made simple – not a complicated editing workflow. Point, shoot, tweak, and post. Done.

Final Verdict: Built for India, Ready for Anything

India’s smartphone users know exactly what they need: a phone that can withstand scorching summers, months of relentless monsoon rain, heavy daily workloads, and years of non-stop use – all without missing a beat. The OPPO F31 Series 5G is it.

With military-grade durability, triple IP protection, and resistance to 18 everyday liquids, the OPPO F31 Series 5G is tough enough to shrug off accidents that would retire most devices. With flagship-grade chipsets, a 7000mAh battery engineered to last five years, blazing-fast SUPERVOOC charging, and OPPO’s 72-month fluency promise, it’s designed for the long haul. And with AI smarts and cameras that can literally swim, it doesn’t just keep up with India’s chaos – it thrives in it.

Put simply: the OPPO F31 Series 5G is India’s most stylishly rugged phone lineup yet. It’s not just about surviving drops, dust, and rain; it’s about staying reliable, powerful, and smart through everything life throws at you.

For the millions who depend on their phones for work, play, and everything in between, this isn’t just an upgrade. It’s peace of mind, in your pocket.

Ready to take the plunge? The First Sale date for the OPPO F31 Series 5G is Sep 19, 2025, and you can buy it on Flipkart, Amazon, the OPPO India E-Store, or at mainline retail outlets near you.
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