The Oppo F31 arrives as a mid-range contender that leans hard into durability and battery life, two areas where budget-conscious buyers often have to compromise. Announced on 17 September 2025 and released ten days later, this CPH2781 model pairs a large 7000 mAh silicon-carbon battery with IP68/IP69 ingress protection and MIL-STD-810H certification, signalling that Oppo wants the F31 to survive everyday abuse without the premium price tag.
Priced at around ₹ 24,999, the F31 slots into a crowded segment where it must justify itself against established rivals. Below we break down what the phone gets right, where it cuts corners, and which type of user will get the most out of its 120Hz AMOLED screen, MediaTek Dimensity 6300 platform, and 80W fast charging.
Full Specifications
Network
| Technology: | GSM / HSPA / LTE / 5G |
| 2G bands: | GSM 850 / 900 / 1800 / 1900 |
| 3G bands: | HSDPA 900 / 2100 |
| 4G bands: | 1, 3, 5, 8, 19, 28, 38, 40, 41, 42, 48 |
| 5G bands: | 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA |
| Speed: | HSPA, LTE, 5G |
Launch
| Announced: | 2025, September 17 |
| Status: | Available. Released 2025, September 27 |
Body
| Dimensions: | 158.2 x 75 x 8 mm (6.23 x 2.95 x 0.31 in) |
| Weight: | 185 g (6.53 oz) |
| SIM: | Nano-SIM + Nano-SIM |
| IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions |
Display
| Type: | AMOLED, 1B colors, 120Hz, 600 nits (typ), 1400 nits (HBM) |
| Size: | 6.57 inches, 105.0 cm2 (~88.5% screen-to-body ratio) |
| Resolution: | 1080 x 2372 pixels (~397 ppi density) |
| Protection: | AGC DT-Star D+ |
Platform
| OS: | Android 15, ColorOS 15 |
| Chipset: | Mediatek Dimensity 6300 (6 nm) |
| CPU: | Octa-core (2×2.4 GHz Cortex-A76 & 6×2.0 GHz Cortex-A55) |
| GPU: | Mali-G57 MC2 |
Memory
| Card slot: | microSDXC |
| Internal: | 128GB 8GB RAM, 256GB 8GB RAM |
| UFS 2.2 |
Main Camera
| Dual: | 50 MP, f/1.8, (wide), PDAF Auxiliary lens |
| Features: | LED flash, HDR, panorama |
| Video: | 1080p@30/60/120fps |
Selfie camera
| Single: | 16 MP, f/2.4, (wide) |
| Features: | Panorama |
| Video: | 1080p@30fps |
Sound
| Loudspeaker: | Yes, with stereo speakers |
| 3.5mm jack: | No |
Comms
| WLAN: | Wi-Fi 802.11 a/b/g/n/ac, dual-band |
| Bluetooth: | 5.4, A2DP, LE, aptX HD |
| Positioning: | GPS, GALILEO, GLONASS, BDS, QZSS |
| NFC: | No |
| Radio: | Unspecified |
| USB: | USB Type-C 2.0, OTG |
Features
| Sensors: | Fingerprint (under display, optical), accelerometer, proximity, compass |
Battery
| Type: | Si/C Li-Ion 7000 mAh |
| Charging: | 80W wired, 33W PPS, 13.5W PD Reverse wired charging |
Misc
| Colors: | Midnight Blue, Bloom Red, Cloud Green |
| Models: | CPH2781 |
| SAR: | 1.18 W/kg (head) 0.81 W/kg (body) |
| Price: | ₹ 24,999 |
Price and Availability
The Oppo F31 offers a compelling combination of features and performance. While the base price is around ₹24,999, the actual cost may vary depending on your location and retailer. Below, you’ll find the approximate price of the Oppo F31 converted into various currencies. Please note that these are estimates based on recent exchange rates as of June 23, 2026 and may not reflect the exact price you’ll find at a retailer.
- United States: $264
- Japan: ¥42,694
- United Kingdom: £199
- Australia: A$377
- Canada: C$374
- Taiwan: NT$8,362
- Denmark: kr1.723
- Saudi Arabia: ﷼990
- South Korea: ₩405,815
- Germany: €231
- Brazil: R$1.359
- Vietnam: ₫6.908.322
- Kenya: KSh 34,205
- India: ₹24,999
- Indonesia: Rp 4.707.802
- Nigeria: ₦360,413
- Pakistan: ₨73,483
- Philippines: ₱16,124
- Bangladesh: ৳৩২,৪৫২
Is the Oppo F31 Worth Its Price?
At roughly ₹ 24,999, the F31 positions itself in the competitive lower-mid tier, and its value proposition rests on a clear theme: ruggedness and endurance over raw horsepower. You get a genuinely large battery, military-grade durability messaging, and a polished 120Hz AMOLED panel, which is an unusual combination at this price. Buyers who prioritise reliability and screen-on time will likely feel the money is well spent, while those chasing peak gaming performance may want to weigh the chipset choice carefully.
Design and Build Quality
Measuring 158.2 x 75 x 8 mm and weighing 185 g, the F31 stays comfortably pocketable despite housing a huge cell. The standout feature is its protection rating: IP68 and IP69 dust and water resistance means it shrugs off high-pressure jets and brief immersion up to 1.5 m, while MIL-STD-810H compliance adds a layer of reassurance against drops and temperature swings. Oppo notes that this certification does not guarantee use in extreme conditions, so treat it as added insurance rather than a licence for abuse. Colour options span Midnight Blue, Bloom Red, and Cloud Green.
Display Experience
The 6.57-inch AMOLED display is one of the F31’s strongest cards. With a 120Hz refresh rate, 1080 x 2372 resolution (~397 ppi), and a high-brightness mode peaking at 1400 nits, scrolling feels fluid and outdoor visibility is respectable. The 1B-colour panel, roughly 88.5% screen-to-body ratio, and AGC DT-Star D+ protection give it a premium-leaning feel that punches above its price bracket, making it a pleasant choice for streaming and social media.
Performance and Software
Powering the F31 is the MediaTek Dimensity 6300, a 6 nm chip with an octa-core layout (2×2.4 GHz Cortex-A76 and 6×2.0 GHz Cortex-A55) and a Mali-G57 MC2 GPU. This is an efficiency-focused platform rather than a flagship killer; it handles daily multitasking, messaging, and casual gaming well, but demanding titles will require dialled-back settings. It ships with Android 15 layered with ColorOS 15, and storage comes in 128GB or 256GB configurations, both with 8GB RAM on UFS 2.2, plus microSDXC expansion for those who need more room.
Camera Capabilities
Photography is handled by a dual rear setup led by a 50 MP f/1.8 wide sensor with PDAF, supported by an auxiliary lens, along with LED flash, HDR, and panorama. Video tops out at 1080p with 30, 60, and 120fps options, so there is no 4K capture here. The 16 MP f/2.4 front camera covers selfies and 1080p@30fps video. For its segment, the F31 should deliver dependable daylight shots, though the absence of higher-resolution video and a dedicated ultrawide keeps it firmly practical rather than ambitious.
Battery Life and Charging
This is the headline act. A Si/C Li-Ion 7000 mAh battery is exceptionally large for a phone this slim, promising multi-day endurance for moderate users. Charging is brisk too, with 80W wired speeds, 33W PPS support, and 13.5W reverse wired charging to top up accessories. For anyone who hates carrying a charger or suffers range anxiety by mid-afternoon, the F31’s battery package is arguably its single most compelling reason to buy.
Connectivity and Extras
The F31 covers 5G across a broad set of SA/NSA bands, alongside dual Nano-SIM support, Wi-Fi 802.11ac dual-band, and Bluetooth 5.4 with aptX HD. Positioning is comprehensive (GPS, Galileo, GLONASS, BDS, QZSS), and there are stereo speakers for media. Note the trade-offs, however: there is no NFC, no 3.5mm headphone jack, and the USB Type-C port runs at USB 2.0 speeds. An under-display optical fingerprint sensor handles security.
Who Should Buy the Oppo F31?
The F31 is best suited to buyers who want a tough, long-lasting daily driver with a great screen and don’t lean heavily on contactless payments or mobile gaming. Frequent travellers, outdoor users, and anyone prone to dropping or splashing their phone will appreciate the durability and battery combination. Power users, mobile photographers wanting 4K video, or those who rely on NFC payments may find the omissions harder to overlook.
Conclusion
The Oppo F31 is a focused mid-ranger that knows exactly what it wants to be: a durable, marathon-battery phone with a likeable 120Hz AMOLED display, wrapped in a slim, IP68/IP69-rated body. Its compromises — no NFC, no 3.5mm jack, USB 2.0, and a value-oriented Dimensity 6300 — are sensible given the price, but they do matter for specific users. If endurance, ruggedness, and a quality screen top your list and you can live without tap-to-pay and 4K recording, the F31 is an easy recommendation at around ₹ 24,999. Buyers who need stronger performance or richer camera versatility should compare it closely against rivals before deciding. As always, confirm current pricing, variants, and availability with official OPPO channels, as these details can change over time.
References
- OPPO India – OPPO F31 5G Specifications – Primary manufacturer specification sheet for model CPH2781, covering dimensions, storage, display, cameras, chipset, battery, charging, bands, connectivity, SAR, OS, and in-box contents.
- OPPO India – OPPO F31 5G Product Page – Official product overview for feature claims such as battery, charging, IP ratings, display highlights, durability messaging, and color options.
- MediaTek – Dimensity 6300 (mediatek.com) – Official chipset vendor source to verify Dimensity 6300 platform details referenced in the phone specifications.
- GSMArena (gsmarena.com) – Established independent phone-specification database useful for cross-checking launch status, network bands, dimensions, and hardware specs against the manufacturer page.
- The Economic Times – OPPO F31 Series Launch Coverage – Reputable news coverage for launch context, market availability, pricing/variants, and high-level series positioning in India.
