OnePlus 15 vs Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)
Quick Comparison
Both OnePlus 15 and Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) comes with same RAM. In terms of display resolution, Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has better resolution of 3200 x 1440 than OnePlus 15 which has resolution of 2772 x 1272. OnePlus 15 has more internal memory than Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)
| Name | OnePlus 15 | Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) |
| RAM | 12 GB | 12 GB |
|---|---|---|
| Display | 6.78 in | 6.8 in |
| Internal Memory | 256 GB | 128 GB |
| Battery | 7300 mAh | 5000 mAh |
| Camera | 50 MP + 50 MP + 50 MP Triple | 108 MP Quad |
| Price | Rs. 72999 | Rs. 101999 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is October 27, 2025. The cost of OnePlus 15 is Rs. 72999. The launch Date of the second phone is January 14, 2021. The Expected cost of Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) is Rs. 101999.
Display comparison
OnePlus 15 has screen size of 6.78 inches which falls short to Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)'s 6.8 inch screen. OnePlus 15 has LTPO AMOLED Screen type where as Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has Screen type. Samsung's phone has display density of 515 PPI & OnePlus's phone has only 450 PPI display density. In terms of screen to body ratio, OnePlus's phone has better screen to body ratio of ~ 95.5% than Samsung's phone ~ 89.8%. OnePlus 15 has 20/9 aspect ratio where as Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has 20:9 aspect ratio.
Memory comparison
Both phones come with 12 GB RAM OnePlus 15 has more Internal Memory (256 GB) than Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) (128 GB).
Camera comparison
Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)'s 108 MP Quad Rear Camera outshines OnePlus 15's 50 MP + 50 MP + 50 MP Triple Rear Camera in terms of resolution. Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 40 MP Front Camera in comparison to OnePlus 15's 32 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 16 and the second one on 10 version.
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Full Comparison
| Name | OnePlus 15 | Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) |
| General | ||
| Country of Origin | India | |
| Model | CPH2745, CPH2747, PLK110 | Galaxy S21 Ultra 5G |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| SAR | 1.17 W/kg (Head) 1 W/kg (Body) | |
| Device Type | Smartphone | Smartphone |
| Release Date | October 27, 2025 | January 14, 2021 |
| In The Box | OnePlus 15, Charger, USB data cable, SIM Ejector Tool, Protective Case, Quick Guide | |
| Design | ||
| Dimensions | 76.7 x 161.4 x 8.1 mm | 75.6 x 165.1 x 8.9 mm |
| Weight | 211 g | 227 g |
| Colors | Infinite Black, Ultra Violet, Sand Storm | |
| Display | ||
| Type | Color LTPO AMOLED Screen (1B Colors) | Color Dynamic AMOLED 2X (16M Colors) |
| Touch | Yes | Yes |
| Size | 6.78 inches, 1272 x 2772 pixels, 165 Hz | 6.8 inches, 1440 x 3200 pixels, 120 Hz |
| Aspect Ratio | 20/9 | 20:9 |
| PPI | ~ 450 PPI | ~ 515 PPI |
| Screen to Body Ratio | ~ 95.5% | ~ 89.8% |
| Glass Type | Corning Gorilla Glass Victus 2 | Corning Gorilla Glass Victus |
| Brightness | 800 nits (typ), 1800 nits (HBM) | |
| Features | Sun Display, Reduce White Point, Eye Comfort Reminders, Motion Cues, Minimum 1nit, Eye Comfort for Gaming | Always-on Display, HDR10+ |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Memory | ||
| RAM | 12 GB | 12 GB |
| RAM Type | LPDDR5X Ultra | |
| Storage | 256 GB | 128 GB |
| Storage Type | UFS 4.1 | UFS 3.1 |
| Card Slot | No | |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | 5G NR: n1/n2/n3/n5/n7/n8/n20/n26/n28/n38/n40/n41/n48/n66/n77/n78 | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Vo5G | Yes | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | Wi-Fi 7 (802.11be), Wi-Fi 6 (802.11ax), Wi-Fi 5 (802.11ac), Wi-Fi Display, WLAN Tethering, Wi-Fi 2.4GHz 2×2+Wi-Fi 5GHz 2×2 concurrent, Wi-Fi 5GHz 160MHz, 2×2 MIMO | |
| Bluetooth | Yes, v6.0, SBC, AAC, LDAC, aptX, aptX HD, aptX Adaptive, LHDC 5.0 | Yes, v5.2, A2DP, LE |
| USB | Yes, USB-C v3.2 | Yes, USB-C v3.2 |
| USB Features | USB Tethering, USB on-the-go, USB Charging | USB on-the-go, USB Charging |
| IR Blaster | Yes | |
| Performance | ||
| AnTuTu Score | 4,187,391 (Total) (v10) | |
| Extra | ||
| GPS | Dual band: GPS(L1+L5), GLONASS(G1), BeiDou(B1I+B1C+B2a), Galileo(E1+E5a), QZSS(L1+L5), NavIC(L5) | Yes, with A-GPS, GLONASS, BDS, GALILEO |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Proximity, Ambient Light, Color Temperature, E-compass, Accelerometer, Gyroscope, In-display Ultrasonic Fingerprint Sensor, Hall Sensor, Laser Focusing Sensor, Spectral Sensor, Infrared Remote Control | Accelerometer, Gyro, Proximity, Compass, Barometer |
| 3.5mm Headphone Jack | No | No |
| NFC | Yes | Yes |
| AI Features | Plus Mind, Gemini AI | |
| Water Resistance | Yes, 2 m upto 30 min | Yes, 1.5 m upto 30 min |
| IP Rating | IP66/IP68/IP69K/IP69 | IP68 |
| Dust Resistant | Yes | Yes |
| Extra Features | OP Gaming Core, Touch Response Chip, G2 Wi-Fi Chip, Bypass Charging, 360° Cryo Velocity Cooling System | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) Sensor: Sony's IMX906, Lens Quantity: 6P, Optical Image Stabilization: Yes, Aperture: ƒ/1.8, Field of View: 84°, Autofocus: Yes 50 MP ƒ/2.8 (Telephoto) Sensor: S5KJN5 with 3.5X optical zoom, 7x optical quality zoom, Lens Quantity: 4P, Optical Image Stabilization: Yes, Aperture: ƒ/2.8, Field of View: 30°, Autofocus: Yes, Ultra Res (digital) Zoom: up to 120x zoom 50 MP ƒ/2 (Ultra Wide) Sensor: OV50D, Lens Quantity: 6P, Aperture: ƒ/2.0, Field of view: 116°, Autofocus: Yes | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) |
| OIS | Yes | Yes |
| Auto Focus | Yes | Yes |
| Features | Photo, Video, Portrait, Night, Panorama, SLO-MO, Long Exposure, Dual-view video, TIME-LAPSE, HI-RES, Underwater, Master, TEXT SCANNER, DOC SCANNER, TILT-SHIFT, PRO VIDEO | Auto-HDR, Panorama |
| Video Recording | 8K @ 30 fps UHD, 4K @ 120/60 fps UHD, 1080p | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 32 MP ƒ/2.4 (Wide Angle) Sensor: Sony IMX709, Lens Quantity: 5P, Focal Length: 21 mm equivalent, Autofocus: Supported, Aperture: f/2.4 Punch Hole, Screen Flash | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus |
| Front Video Recording | 4K @ 60 fps UHD, 1080p @ 60 fps FHD | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v16 | Android v10 |
| Custom UI | OxygenOS 16 | |
| Chipset | Qualcomm Snapdragon 8 Elite Gen 5 | Samsung Exynos 2100 |
| CPU | 4.6 GHz, Octa Core Processor | 2.9 GHz, Octa Core Processor |
| Core Details | 2x4.6 GHz Oryon V3 Phoenix L + 6x3.62 GHz Oryon V3 Phoenix M | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 |
| GPU | Adreno 840 | Mali-G78 MP14 |
| Java | No | No |
| Browser | Yes | Yes |
| Multimedia | ||
| Supports | JPEG, PNG, BMP, GIF, WEB, HEIF, HEIC, DNG | |
| Yes | Yes | |
| Music | MP3, AAC, AAC+, WMA, AMR-NB, AMR-WB, WAV, FLAC, APE, OGG, MID, M4A, IMY, AC3, EAC3, EAC3-JOC, AC4 | Yes |
| Video | Dolby Vision, HDR10, HDR10+, +HLG, HDRViVid, MKV, MOV, MP4, H.265 (HEVC), AVI, WMV, TS, 3GP, ASF, FLV, WEB | Yes |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 7300 mAh, Si/C | 5000 mAh, Li-Po Battery |
| Fast Charging | Yes, 120W SUPERVOOC Charging | Yes, 25W Fast Charging |
| Wireless Charging | Yes, 50W AIRVOOC | Yes, 15W |
| Reverse Charging | Yes, 10W | Yes, 4.5W |
| Reverse Wireless Charging | Yes, 5W | |