Oppo F31 5G (8GB RAM + 256GB) vs Samsung Galaxy M21 2021 (6GB RAM + 128GB)
Quick Comparison
Oppo F31 5G (8GB RAM + 256GB) has better RAM than Samsung Galaxy M21 2021 (6GB RAM + 128GB). In terms of display resolution, Oppo F31 5G (8GB RAM + 256GB) has better resolution of 2412 x 1080 than Samsung Galaxy M21 2021 (6GB RAM + 128GB) which has resolution of 2340 x 1080. Oppo F31 5G (8GB RAM + 256GB) has more internal memory than Samsung Galaxy M21 2021 (6GB RAM + 128GB)
| Name | Oppo F31 5G (8GB RAM + 256GB) | Samsung Galaxy M21 2021 (6GB RAM + 128GB) |
| RAM | 8 GB | 6 GB |
|---|---|---|
| Display | 6.57 in | 6.4 in |
| Internal Memory | 256 GB | 128 GB |
| Battery | 7000 mAh | 6000 mAh |
| Camera | 50 MP + 2 MP Dual | 48 MP + 8 MP + 5 MP Triple |
| Price | Rs. 28999 | Rs. 12999 |
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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 5G (8GB RAM + 256GB) is Rs. 28999. The launch Date of the second phone is July 21, 2021. The cost of Samsung Galaxy M21 2021 (6GB RAM + 128GB) is Rs. 12999.
Display comparison
Oppo F31 5G (8GB RAM + 256GB) has larger screen size of 6.57 inches in comparison to Samsung Galaxy M21 2021 (6GB RAM + 128GB)'s 6.4 inch screen. Oppo F31 5G (8GB RAM + 256GB) has AMOLED Screen type where as Samsung Galaxy M21 2021 (6GB RAM + 128GB) has Super AMOLED Screen type. Samsung's phone has display density of 403 PPI & OPPO's phone has only 402 PPI display density. In terms of screen to body ratio, OPPO's phone has better screen to body ratio of ~ 92.2% than Samsung's phone ~ 84.2%. Oppo F31 5G (8GB RAM + 256GB) has 20:9 aspect ratio where as Samsung Galaxy M21 2021 (6GB RAM + 128GB) has 19.5:9 aspect ratio.
Memory comparison
Oppo F31 5G (8GB RAM + 256GB)'s larger 8 GB RAM is better for playing games and all with respect to Samsung Galaxy M21 2021 (6GB RAM + 128GB)'s lower 6 GB RAM. Oppo F31 5G (8GB RAM + 256GB) has more Internal Memory (256 GB) than Samsung Galaxy M21 2021 (6GB RAM + 128GB) (128 GB).
Camera comparison
Oppo F31 5G (8GB RAM + 256GB)'s 50 MP + 2 MP Dual Rear Camera outshines Samsung Galaxy M21 2021 (6GB RAM + 128GB)'s 48 MP + 8 MP + 5 MP Triple Rear Camera in terms of resolution. Samsung Galaxy M21 2021 (6GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 20 MP Front Camera in comparison to Oppo F31 5G (8GB RAM + 256GB)'s 16 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 11 version.
Related Comparisons
Full Comparison
| Name | Oppo F31 5G (8GB RAM + 256GB) | Samsung Galaxy M21 2021 (6GB RAM + 128GB) |
| General | ||
| Country of Origin | India | |
| Model | CPH2781 | Galaxy M21 2021 |
| Sim Type | Dual Sim, GSM+GSM (Hybrid Slot) | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | September 15, 2025 | July 21, 2021 |
| In The Box | Handset, Charger, USB Data Cable, Sim Ejector Tool, Quick Guide, Protective Case | |
| Design | ||
| Dimensions | 75.1 x 159 x 9 mm | |
| Weight | 192 g | |
| Display | ||
| Type | Color AMOLED Screen (16M Colors) | Color Super AMOLED Screen (16M Colors) |
| Touch | Yes, 360 Hz Touch Sampling Rate | Yes |
| Size | 6.57 inches, 1080 x 2412 pixels, 120 Hz | 6.4 inches, 1080 x 2340 pixels, 60 Hz |
| Aspect Ratio | 20:9 | 19.5:9 |
| PPI | ~ 402 PPI | ~ 403 PPI |
| Screen to Body Ratio | ~ 92.2% | ~ 84.2% |
| Glass Type | AGC DT-Star D+ | Corning Gorilla Glass 3 |
| Features | 420 nits (peak) | |
| Notch | Yes, Punch Hole | Yes, Water Drop Notch |
| Memory | ||
| RAM | 8 GB | 6 GB |
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 256 GB | 128 GB |
| Storage Type | UFS 2.2 | |
| Card Slot | Yes, (Hybrid 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/n7/n8/n20/n28A/n28B/n66/n38/n40/n41/n77/n78 | |
| VoLTE | Yes, Dual Stand-By | Yes |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | 802.11 a/b/g/n/ac, Wi-Fi 5 (802.11 ac), 802.11 a/b/g/n, WLAN (2.4 GHz | 5 GHz), WLAN Display, WLAN Tethering, 1 x 1 SOSO | |
| Bluetooth | Yes, v5.4, Support SBC, AAC, aptX, aptX HD, LDAC, LHDC | Yes, v5.0 |
| USB | Yes, USB-C v2.0 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging |
| IR Blaster | Yes | |
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO, QZSS | Yes, with A-GPS, Glonass, Beidou, Galileo |
| Fingerprint Sensor | Yes, Side | Yes, Rear |
| Face Unlock | Yes | Yes |
| Sensors | Geomagnetic Induction, Ambient Light Induction, Proximity Sensor, Acceleration Sensor, Gravity Sensor, Gyroscope, Infrared Sensor, Step Recording Function, Facial Recognition Sensor | Accelerometer, Gyro Sensor, Geomagnetic Sensor, Proximity Sensor, Virtual Light Sensing |
| 3.5mm Headphone Jack | No | Yes |
| AI Features | Smart Document (AI summaries, translations, rewriting), Smart Note (AI-enhanced note-taking), and high-quality scanning. Integrated Google Gemini delivers multimodal AI intelligence | |
| Water Resistance | Yes | |
| IP Rating | IP69+IP68+IP66 | |
| Dust Resistant | Yes | |
| Extra Features | 4300 mm² VC cooling system | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) Sensor: OV50D40, Sensor size: 1/2.88″, Single pixel size: 0.612 um, Aperture size: f/1.8, Focal length: 27 mm, Lens configuration: 5P, Supporting AF 2 MP Sensor: GC02M1-C24YK, Sensor size: 1/5″, Single pixel size: 1.75 um, Aperture size: f/2.4, Focal length: 22 mm, Lens configuration: 3P | 48 MP ƒ/2 (Wide Angle) 8 MP ƒ/2.2 (Ultra Wide) 5 MP ƒ/2.2 (Depth Sensor) |
| Auto Focus | Yes | Yes |
| Features | Panorama, HDR | |
| Video Recording | 1080p @ 30 fps FHD, 720p | 4K @ 30 fps UHD, 1080p @ 30 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 16 MP (Wide Angle) Sensor size: 1/3.09″, Single pixel size: 1.0 um, Aperture size: f/2.4, Focal length: 23 mm, Lens configuration: 4P Punch Hole | 20 MP ƒ/2 (Wide Angle) |
| Front Video Recording | 1080p @ 30 fps FHD | 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v15 | Android v11 |
| Custom UI | ColorOS 15 | |
| Chipset | Mediatek Dimensity 6300 | Samsung Exynos 9611 |
| CPU | 2.4 GHz, Octa Core Processor | 2.3 GHz, Octa Core Processor |
| Core Details | 2X Arm Cortex-A76@2.4GHz & 6X Arm Cortex-A55@2.0GHz | 4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53 |
| GPU | Arm Mali-G57 MC2 | Mali-G72 MP3 |
| 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 |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 7000 mAh | 6000 mAh, Li-Po Battery |
| Fast Charging | Yes, 80W SUPERVOOC Charging | Yes, 15W Fast Charging |
| Reverse Charging | Yes | |
| Talk Time | 49 hours | |
| Music Playback Time | 131 hours | |