The Oppo F31 is a 5G Android phone built around long battery life, a slim mid-range body, and practical durability features. It pairs a 7000 mAh silicon-carbon battery with 80W wired charging, making endurance the central reason to look at this model.
Instead of chasing flagship camera hardware or premium chipset performance, the phone focuses on everyday usability: a 120Hz AMOLED display, stereo speakers, expandable storage, dual SIM support, and IP68/IP69 protection. That makes it a comparison-friendly option for buyers who want a dependable OPPO phone with strong battery credentials.
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 August 11, 2026 and may not reflect the exact price you’ll find at a retailer.
- United States: $262
- Japan: ¥41,721
- United Kingdom: £194
- Australia: A$371
- Canada: C$365
- Taiwan: NT$8,432
- Denmark: kr1.693
- Saudi Arabia: ﷼982
- South Korea: ₩369,896
- Germany: €227
- Brazil: R$1.338
- Vietnam: ₫6.851.799
- Kenya: KSh 33,864
- India: ₹24,999
- Indonesia: Rp 4.673.388
- Nigeria: ₦356,788
- Pakistan: ₨72,775
- Philippines: ₱16,036
- Bangladesh: ৳৩২,৩৬৪
Value Positioning
The Oppo F31 sits in a category where battery capacity, display quality, software polish, and durability matter more than headline benchmark numbers. Its strongest value argument is the combination of a 7000 mAh battery, 80W wired charging, a 120Hz AMOLED panel, and broad 5G band support. Those are meaningful features for users who keep a phone for long days of messaging, navigation, video streaming, hotspot use, and calls.
The listed configuration options are straightforward: 128GB or 256GB of internal storage, both paired with 8GB of RAM. The presence of a microSDXC card slot also gives the phone an advantage over many mid-range models that force buyers to choose a higher storage tier upfront. UFS 2.2 storage is not flagship-class, but it is appropriate for the segment and should help routine app loading and file handling feel reasonably responsive.
Design and Durability
At 158.2 x 75 x 8 mm and 185 g, the Oppo F31 is not especially bulky considering its battery size. The 8 mm profile is notable because large-battery phones often feel thick or heavy in daily use. The dual Nano-SIM setup is useful for users who separate work and personal numbers or rely on different carriers for data and calls.
The durability story is one of the phone’s clearest differentiators. The IP68/IP69 rating means the device is listed as dust tight, resistant to immersion up to 1.5 meters for 30 minutes, and protected against high-pressure water jets. OPPO also lists MIL-STD-810H compliance, though this should be read carefully: it does not guarantee ruggedness or safe use in extreme conditions. In practical terms, the F31 should appeal to users who want better-than-basic protection against rain, splashes, dust, and rough daily handling without moving to a dedicated rugged phone.
Display Experience
The 6.57-inch AMOLED display is a strong fit for media and general use. It supports 1 billion colors, a 120Hz refresh rate, 1080 x 2372 pixel resolution, and a density of about 397 ppi. That combination should deliver sharp text, smooth scrolling, and the contrast benefits expected from AMOLED technology.
Brightness is listed at 600 nits typical and 1400 nits high brightness mode, which gives the phone a useful margin for outdoor viewing. The display also uses AGC DT-Star D+ protection. Buyers comparing the F31 against LCD-based alternatives should see the screen as one of its advantages, especially for streaming, reading, and social apps.
Performance and Software
The Oppo F31 uses the MediaTek Dimensity 6300, a 6 nm chipset with two Cortex-A76 performance cores at 2.4 GHz and six Cortex-A55 efficiency cores at 2.0 GHz. Graphics are handled by the Mali-G57 MC2. This is a practical 5G platform aimed at mainstream performance rather than gaming-first power.
For everyday tasks such as browsing, payments where supported, messaging, camera use, video playback, and multitasking between common apps, the chipset and 8GB RAM setup should be sufficient. Heavy 3D gaming and demanding editing workloads are not the main target here. On the software side, the phone ships with Android 15 and ColorOS 15, giving buyers a current OPPO interface with modern Android features out of the box.
Camera Setup
The rear camera system is simple: a 50 MP wide camera with f/1.8 aperture and PDAF, supported by an auxiliary lens. Features include LED flash, HDR, and panorama. Video recording reaches 1080p at 30, 60, and 120 fps, which gives users more flexibility than basic 30 fps-only recording.
The front camera is a 16 MP wide unit with f/2.4 aperture, panorama support, and 1080p video at 30 fps. This setup is best understood as practical rather than ambitious. The F31 should suit casual photography, social media images, documents, and video calls, but buyers focused on ultrawide shots, telephoto zoom, or high-end low-light imaging should compare it carefully with camera-focused alternatives.
Battery and Charging
Battery life is the Oppo F31’s headline strength. The 7000 mAh silicon-carbon Li-Ion battery gives the phone a clear endurance advantage over many conventional mid-range models. A capacity this large is especially useful for users who travel, work outdoors, use mobile data heavily, or dislike charging during the day.
Charging support is also broad. The phone lists 80W wired charging, 33W PPS, 13.5W PD, and reverse wired charging. The reverse charging feature can be useful for topping up accessories or another small device in a pinch. As always, real charging speed depends on the compatible charger, cable, temperature, and battery management behavior, but the specifications make the F31 a strong option for buyers who prioritize power management.
Connectivity and Audio
The network package covers GSM, HSPA, LTE, and 5G, with SA and NSA 5G band support. The listed bands include commonly relevant Indian 5G bands such as n77 and n78, along with multiple LTE bands. This makes the F31 better suited to modern carrier networks than older 4G-only phones.
Wireless connectivity includes dual-band Wi-Fi 802.11 a/b/g/n/ac, Bluetooth 5.4 with A2DP, LE, and aptX HD, plus GPS, GALILEO, GLONASS, BDS, and QZSS positioning. NFC is not included, which matters for buyers who rely on tap-based services where NFC is required. Audio is handled by stereo speakers, but there is no 3.5 mm headphone jack, so wired audio users will need USB-C or wireless options.
Who Should Buy the Oppo F31?
The Oppo F31 makes the most sense for buyers who want a long-lasting 5G phone with a good AMOLED display, modern Android software, expandable storage, and stronger water and dust resistance than many mid-range competitors. It is also a good match for users who value practical features over camera variety or gaming-focused silicon.
It is less ideal for buyers who need NFC, a headphone jack, an ultrawide camera, a telephoto camera, or flagship-grade gaming performance. In comparison shopping, the F31 should be judged as an endurance-first OPPO phone: its biggest strengths are battery, charging, display quality, and durability rather than a complex camera system.
Conclusion
The Oppo F31 is a practical 5G smartphone for users who want excellent battery capacity, fast wired charging, a smooth AMOLED display, and useful durability ratings in a slim body. Choose it if endurance and everyday reliability matter more than flagship cameras or top-tier gaming performance.
References
- OPPO India – OPPO F31 5G Specifications – Primary source for the OPPO F31 5G model number, dimensions, storage variants, display, cameras, chipset, battery, charging, network bands, SAR values, OS, and in-box contents.
- OPPO India – OPPO F31 5G Product Page – Official product page for feature claims such as 7000mAh battery, 80W SUPERVOOC charging, 120Hz AMOLED display, IP ratings, durability, colors, and key marketing details.
- OPPO India Newsroom – F31 5G Series Launch – Official launch announcement for release context, series lineup, India availability, positioning, and launch claims.
- MediaTek – Dimensity 6300 – Official chipset reference to verify Dimensity 6300 CPU, GPU, display, camera, memory, storage, and 5G connectivity capabilities used in the OPPO F31 5G.
