The Oppo F31 and Samsung Galaxy A51 5G UW represent different approaches to the mid-range 5G market. The F31 aggressively targets charging speed and modern chipset architecture, while the A51 5G UW leverages Samsung’s brand recognition and established software ecosystem. This comparison dissects their core components to determine which device delivers the best overall experience.
🏆 Quick Verdict
For the average user prioritizing rapid replenishment and a more modern chipset, the Oppo F31 emerges as the winner. Its 80W charging dramatically reduces downtime, and the Dimensity 6300 offers a performance edge. However, Samsung’s software and 5G UW support may appeal to specific users.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands | 1, 3, 5, 8, 19, 28, 38, 40, 41, 42, 48 | 2, 4, 5, 13, 66 |
| 5G bands | 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA | 260, 261 mmWave |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / HSPA / LTE / 5G | GSM / HSPA / LTE / 5G |
| Launch |
|---|
| Announced | 2025, September 17 | 2020, August 14 |
| Status | Available. Released 2025, September 27 | Available. Released 2020, August 14 |
| Body |
|---|
| Build | - | Glass front (Gorilla Glass 3), plastic back, aluminum frame |
| Dimensions | 158.2 x 75 x 8 mm (6.23 x 2.95 x 0.31 in) | 158.8 x 73.4 x 8.6 mm (6.25 x 2.89 x 0.34 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM (pre-installed) |
| Weight | 185 g (6.53 oz) | 188.8 g (6.67 oz) |
| Display |
|---|
| Protection | AGC DT-Star D+ | Corning Gorilla Glass 3 |
| Resolution | 1080 x 2372 pixels (~397 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) |
| Size | 6.57 inches, 105.0 cm2 (~88.5% screen-to-body ratio) | 6.5 inches, 102.0 cm2 (~87.5% screen-to-body ratio) |
| Type | AMOLED, 1B colors, 120Hz, 600 nits (typ), 1400 nits (HBM) | Super AMOLED |
| Platform |
|---|
| CPU | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver) |
| Chipset | Mediatek Dimensity 6300 (6 nm) | Qualcomm SM7250 Snapdragon 765G 5G (7 nm) |
| GPU | Mali-G57 MC2 | Adreno 620 |
| OS | Android 15, ColorOS 15 | Android 10, One UI 2 |
| Memory |
|---|
| Card slot | microSDXC | microSDXC (uses shared SIM slot) |
| Internal | 128GB 8GB RAM, 256GB 8GB RAM | 128GB 6GB RAM |
| | - | UFS 2.1 |
| Main Camera |
|---|
| Dual | 50 MP, f/1.8, (wide), PDAF
Auxiliary lens | - |
| Features | LED flash, HDR, panorama | LED flash, panorama, HDR |
| Quad | - | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
12 MP, f/2.2, 123˚ (ultrawide)
5 MP (macro)
Auxiliary lens |
| Single | - | 5 MP, AF |
| Video | 1080p@30/60/120fps | 4K@30fps, 1080p@30/120fps; gyro-EIS |
| Selfie camera |
|---|
| Features | Panorama | HDR |
| Single | 16 MP, f/2.4, (wide) | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps |
| Sound |
|---|
| 3.5mm jack | - | Yes |
| 35mm jack | No | Yes |
| Loudspeaker | Yes, with stereo speakers | Yes |
| Comms |
|---|
| Bluetooth | 5.4, A2DP, LE, aptX HD | 5.0, A2DP, LE |
| NFC | No | Yes |
| Positioning | GPS, GALILEO, GLONASS, BDS, QZSS | GPS, GLONASS, GALILEO, BDS |
| Radio | Unspecified | FM radio, RDS, recording |
| USB | USB Type-C 2.0, OTG | USB Type-C 2.0, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Features |
|---|
| Sensors | Fingerprint (under display, optical), accelerometer, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| | - | ANT+ |
| Battery |
|---|
| Charging | 80W wired, 33W PPS, 13.5W PD
Reverse wired charging | 15W wired |
| Stand-by | - | Up to 672 h |
| Talk time | - | Up to 5 h |
| Type | Si/C Li-Ion 7000 mAh | Li-Po 4500 mAh |
| Misc |
|---|
| Colors | Midnight Blue, Bloom Red, Cloud Green | Prism Bricks Blue |
| Models | CPH2781 | SM-A516V |
| Price | ₹ 23,999 | About 470 EUR |
| SAR | 1.18 W/kg (head) 0.81 W/kg (body) | 0.70 W/kg (head) 1.25 W/kg (body) |
| SAR EU | - | 0.59 W/kg (head) 1.32 W/kg (body) |
Oppo F31
- Blazing-fast 80W charging
- More modern and efficient Dimensity 6300 chipset
- Reverse wired charging capability
- Limited brand recognition compared to Samsung
- Specific display details are unknown
Samsung Galaxy A51 5G UW
- Samsung’s established One UI software
- Compatibility with 5G UW networks
- Strong brand reputation
- Significantly slower 15W charging
- Older Snapdragon 765G chipset
- Less efficient processor
Display Comparison
Neither device boasts a particularly standout display. While specific panel details (like peak brightness or color gamut coverage) are absent for the Oppo F31, the Samsung Galaxy A51 5G UW is expected to have a standard Super AMOLED panel common to its price bracket. The focus here isn't on display quality, but rather on the underlying processing power needed to drive more demanding displays – a point where the Oppo F31’s newer chipset may have an advantage in rendering complex visuals.
Camera Comparison
Without detailed camera specs beyond the presence of sensors, a direct comparison is difficult. However, the chipset’s ISP (Image Signal Processor) plays a crucial role. The Dimensity 6300’s ISP is likely more advanced than the one in the Snapdragon 765G, potentially leading to better image processing, noise reduction, and dynamic range. The absence of information regarding sensor sizes and apertures makes it impossible to definitively declare a winner, but the F31’s newer chipset suggests a potential advantage in computational photography.
Performance
The core difference lies in the chipsets. The Oppo F31’s Mediatek Dimensity 6300 (6nm) utilizes a more modern architecture than the Samsung Galaxy A51 5G UW’s Qualcomm Snapdragon 765G (7nm). The Dimensity 6300’s Cortex-A76 cores, clocked at 2.4GHz, are generally more efficient and powerful than the Kryo 475 Prime core in the Snapdragon 765G, also at 2.4GHz. While both are octa-core CPUs, the Dimensity 6300’s 6nm process should translate to better thermal management and sustained performance during demanding tasks. The Snapdragon 765G benefits from Qualcomm’s optimized software and modem integration, but the F31’s newer architecture provides a potential edge in raw processing power.
Battery Life
The Oppo F31’s 80W wired charging is a game-changer. While the battery capacity isn’t specified, 80W charging will significantly reduce charging times compared to the Samsung Galaxy A51 5G UW’s 15W charging. The F31 also supports 33W PPS and 13.5W PD, offering versatility. The A51 5G UW’s slower charging means longer periods tethered to a wall outlet. Even if the A51 5G UW had a larger battery capacity, the F31’s charging speed would likely make it more convenient for users who frequently need to top up their device. The F31 also offers reverse wired charging, a feature absent on the A51 5G UW.
Buying Guide
Buy the Oppo F31 if you need blazing-fast charging, a more efficient processor for everyday tasks, and aren't heavily invested in the Samsung ecosystem. Buy the Samsung Galaxy A51 5G UW if you prioritize Samsung’s One UI, require compatibility with specific 5G UW networks, or prefer a more established brand with a wider support network.
Frequently Asked Questions
❓ Will the Dimensity 6300 in the Oppo F31 handle demanding games like PUBG or Genshin Impact smoothly?
The Dimensity 6300’s Cortex-A76 cores and 6nm process should provide a noticeable performance boost over the Snapdragon 765G, allowing for playable frame rates in PUBG and Genshin Impact at medium settings. However, sustained performance will depend on the phone’s thermal management capabilities, which are currently unknown.
❓ How long does it *actually* take to charge the Oppo F31 from 0% to 100% with the 80W charger?
While Oppo doesn't provide exact figures, 80W charging typically takes around 30-40 minutes to fully charge a similarly sized battery. This is a significant improvement over the several hours required with the Samsung Galaxy A51 5G UW’s 15W charger.
❓ Does the Samsung Galaxy A51 5G UW support carrier aggregation for faster 5G speeds?
Yes, the Snapdragon 765G modem in the A51 5G UW supports carrier aggregation, which allows it to combine multiple 5G channels for faster download and upload speeds, particularly on networks that support it. This is a key benefit of the Snapdragon modem.
❓ Is the lack of a headphone jack on either phone a significant drawback?
The absence of a headphone jack is becoming increasingly common in this price range. Users who rely on wired headphones will need to use a USB-C adapter, which adds an extra cost and potential inconvenience.
