Oppo F31 Pro 5G (12GB RAM + 256GB) vs Samsung Galaxy M51 (8GB RAM + 128GB)
Quick Comparison
Oppo F31 Pro 5G (12GB RAM + 256GB) has better RAM than Samsung Galaxy M51 (8GB RAM + 128GB). In terms of display resolution, Samsung Galaxy M51 (8GB RAM + 128GB) has better resolution of 2400 x 1080 than Oppo F31 Pro 5G (12GB RAM + 256GB) which has resolution of 2372 x 1080. Oppo F31 Pro 5G (12GB RAM + 256GB) has more internal memory than Samsung Galaxy M51 (8GB RAM + 128GB)
| Name | Oppo F31 Pro 5G (12GB RAM + 256GB) | Samsung Galaxy M51 (8GB RAM + 128GB) |
| RAM | 12 GB | 8 GB |
|---|---|---|
| Display | 6.57 in | 6.7 in |
| Internal Memory | 256 GB | 128 GB |
| Battery | 7000 mAh | 7000 mAh |
| Camera | 50 MP + 2 MP Dual | 64 MP Quad |
| Price | Rs. 30999 | Rs. 30999 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is September 15, 2025. The cost of Oppo F31 Pro 5G (12GB RAM + 256GB) is Rs. 30999. The launch Date of the second phone is September 10, 2020. The cost of Samsung Galaxy M51 (8GB RAM + 128GB) is Rs. 30999.
Display comparison
Samsung Galaxy M51 (8GB RAM + 128GB) has larger screen size of 6.7 inches in comparison to Oppo F31 Pro 5G (12GB RAM + 256GB)'s 6.57 inch screen. Oppo F31 Pro 5G (12GB RAM + 256GB) has AMOLED Screen type where as Samsung Galaxy M51 (8GB RAM + 128GB) has Super AMOLED Plus Screen type. OPPO's phone has display density of 390 PPI & Samsung's phone has only 386 PPI display density. In terms of screen to body ratio, OPPO's phone has better screen to body ratio of ~ 93% than Samsung's phone ~ 86.7%. Both phones have same aspect ratio of 20:9.
Memory comparison
Oppo F31 Pro 5G (12GB RAM + 256GB)'s larger 12 GB RAM is better for playing games and all with respect to Samsung Galaxy M51 (8GB RAM + 128GB)'s lower 8 GB RAM. Oppo F31 Pro 5G (12GB RAM + 256GB) has more Internal Memory (256 GB) than Samsung Galaxy M51 (8GB RAM + 128GB) (128 GB).
Camera comparison
Samsung Galaxy M51 (8GB RAM + 128GB)'s 64 MP Quad Rear Camera outshines Oppo F31 Pro 5G (12GB RAM + 256GB)'s 50 MP + 2 MP Dual Rear Camera in terms of resolution. Both of them stand equal in terms of Front Camera Resolution as both have 32 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 15 and the second one on 10 version.
Related Comparisons
Full Comparison
| Name | Oppo F31 Pro 5G (12GB RAM + 256GB) | Samsung Galaxy M51 (8GB RAM + 128GB) |
| General | ||
| Model | F31 Pro | M51 |
| Sim Type | Dual Sim, GSM+GSM (Hybrid Slot) | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| SAR | 1.13 W/kg (Head) 0.85 W/kg (Body) | |
| Device Type | Smartphone | Smartphone |
| Release Date | September 15, 2025 | September 10, 2020 |
| In The Box | Phone x 1, Charger x 1, USB Data Cable x 1, SIM Ejector Tool x 1, Protective Case x 1, Quick Guide x 1 | |
| Design | ||
| Dimensions | 75 x 158.2 x 8 mm | 76.3 x 163.9 x 9.5 mm |
| Weight | 191 g | 213 g |
| Colors | Space Grey | Desert Gold | |
| Display | ||
| Type | Color AMOLED Screen (1.07 B) | Color Super AMOLED Plus Screen (16M Colors) |
| Touch | Yes, 240 Hz Touch Sampling Rate | Yes |
| Size | 6.57 inches, 1080 x 2372 pixels, 120 Hz | 6.7 inches, 1080 x 2400 pixels |
| Aspect Ratio | 20:9 | 20:9 |
| PPI | ~ 390 PPI | ~ 386 PPI |
| Screen to Body Ratio | ~ 93% | ~ 86.7% |
| Glass Type | DT-Star D+ | Corning Gorilla Glass 3 |
| Brightness | Normal brightness: 600nits (Typical), HBM: 1400nits (Typical) | |
| Features | Vivid mode: 100% DCI-P3, Natural mode: 100% sRGB | |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Memory | ||
| RAM | 12 GB | 8 GB |
| RAM Type | LPDDR4X | |
| Expandable RAM | Upto 12 GB Extra Virtual RAM | |
| Storage | 256 GB | 128 GB |
| Storage Type | UFS 3.1 | |
| Card Slot | Yes, upto 512 GB | |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | |
| 5G Bands | n1/n3/n5/n8/n28B/n38/n40/n41/n77/n78 | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | Wi-Fi 6 (802.11ax) Supported, Wi-Fi 5 (802.11ac) Supported, 802.11a/b/g/n Supported, Wi-Fi Display Supported, WLAN Tethering Supported | |
| Bluetooth | Yes, v5.4, SBC, AAC, LDAC, aptX, aptX HD | Yes, v5.0, A2DP, LE |
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | USB Tethering, USB on-the-go, USB Charging |
| Extra | ||
| GPS | Single band: Beidou, GPS, GLONASS, Galileo, QZSS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| Fingerprint Sensor | Yes, In Display | Yes, Side |
| Face Unlock | Yes | Yes |
| Sensors | Proximity, Ambient light, Color temperature, E-compass, Accelerometer, Gyroscope | Accelerometer, Gyro Sensor, Geomagnetic Sensor, RGB Light Sensor, Proximity Sensor, Compass |
| 3.5mm Headphone Jack | No | Yes |
| NFC | Yes | |
| AI Features | AI Eraser 2.0, AI Perfect Shot, AI Group Photo Composer, AI Recompose, AI VoiceScribe, AI Call Assistant, AI Assistant for Notes, Google Gemini | |
| Water Resistance | Yes | |
| IP Rating | IP69 + IP68 + IP66 | |
| Dust Resistant | Yes | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) FOV 78°; 5P lens; AF Supported; Supports two-axis OIS 2 MP ƒ/2.4 (Macro) FOV 89°; 3P lens | 64 MP ƒ/1.8 (Wide Angle) 12 MP ƒ/2.2 (Ultra Wide) 5 MP ƒ/2.4 (Depth Sensor) 5 MP ƒ/2.4 (Macro) Macro |
| Camera Sensor | Sony IMX682 | |
| Auto Focus | Yes | Yes |
| Features | Photo, Video, Portrait, Night, Panorama, SLO-MO, DUAL-VIEW VIDEO, TIME-LAPSE, STICKER, HI-RES, Underwater, PRO, DOC SCANNER | Panorama, HDR |
| Video Recording | 4K @ 30 fps UHD, 1080p @ 60 fps FHD, 720p @ 60 fps HD | 4K @ 30 fps UHD, 1080p @ 30 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 32 MP ƒ/2.4 (Wide Angle) FOV 82°; 5P lens Punch Hole | 32 MP ƒ/2 (Wide Angle) Punch Hole, Screen Flash |
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v15 | Android v10 |
| Custom UI | ColorOS 15 | |
| Chipset | mediatek Dimensity 7300 Energy | Qualcomm Snapdragon 730G |
| CPU | 2.5 GHz, Octa Core Processor | 2.2 GHz, Octa Core Processor |
| Core Details | 4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55 | 2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver |
| GPU | Mali-G615 MC2 | Adreno 618 |
| Java | No | No |
| Browser | Yes | Yes, supports HTML5 |
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | MP3, M4A, 3GA, AAC, OGG, OGA, WAV, WMA, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA |
| Video | Yes | MP4, M4V, 3GP, 3G2, WMV, ASF, AVI, FLV, MKV, WEBM |
| FM Radio | No | Yes |
| Audio Jack Type | USB Type-C | |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 7000 mAh | 7000 mAh, Li-Po Battery |
| Fast Charging | Yes, 80W SuperVOOC | Yes, 25W Fast Charging |
| Reverse Charging | Yes | Yes |
| Talk Time | 64 hours | |
| Music Playback Time | 182 hours | |