Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) vs Samsung Galaxy S21 Ultra
Quick Comparison
Both Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) and Samsung Galaxy S21 Ultra comes with same RAM. In terms of display resolution, Samsung Galaxy S21 Ultra has better resolution of 3200 x 1440 than Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) which has resolution of 2772 x 1280. Both have the same amount of internal memory.
| Name | Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) | Samsung Galaxy S21 Ultra |
| RAM | 12 GB | 12 GB |
|---|---|---|
| Display | 6.83 in | 6.8 in |
| Internal Memory | 256 GB | 256 GB |
| Battery | 6500 mAh | 5000 mAh |
| Camera | 200 MP + 8 MP Dual | 108 MP Quad |
| Price | Rs. 41749 | Rs. 47990 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is December 18, 2025. The cost of Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) is Rs. 41749. The launch Date of the second phone is January 14, 2021. The cost of Samsung Galaxy S21 Ultra is Rs. 47990.
Display comparison
Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) has larger screen size of 6.83 inches in comparison to Samsung Galaxy S21 Ultra's 6.8 inch screen. Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) has AMOLED Screen type where as Samsung Galaxy S21 Ultra has Screen type. Samsung's phone has display density of 515 PPI & Xiaomi's phone has only 447 PPI display density. In terms of screen to body ratio, Samsung's phone has better screen to body ratio of ~ 89.8% than Xiaomi's phone ~ 89.6%. Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) has 20.1:9 aspect ratio where as Samsung Galaxy S21 Ultra has 20:9 aspect ratio.
Memory comparison
Both phones come with 12 GB RAM and both have same Internal Memory of 256 GB.
Camera comparison
Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB)'s 200 MP + 8 MP Dual Rear Camera outshines Samsung Galaxy S21 Ultra's 108 MP Quad Rear Camera in terms of resolution. Samsung Galaxy S21 Ultra will be better choice if you're looking to click lot of selfies as it has better 40 MP Front Camera in comparison to Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB)'s 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 | Xiaomi Redmi Note 15 Pro Plus (12GB RAM + 256GB) | Samsung Galaxy S21 Ultra |
| General | ||
| Country of Origin | India | |
| Model | 2510ERA8BG | Galaxy S21 Ultra 5G |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | nano SIM + nano SIM or nano SIM + eSIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| OS Updates | 4 years | |
| Security Updates | 6 years | |
| Release Date | December 18, 2025 | January 14, 2021 |
| In The Box | REDMI Note 15 Pro+ 5G/ Adapter/ USB Type-C Cable/ SIM Eject Tool/ Protective Case/ Quick Start Guide/ Warranty Card | |
| Design | ||
| Dimensions | 78.3 x 163.3 x 8.2 mm | 75.6 x 165.1 x 8.9 mm |
| Weight | 207 g | 227 g |
| Colors | Mirage Blue, Coffee Mocha, Carbon Black | |
| Display | ||
| Type | Color AMOLED Screen (1B Colors) | Color Dynamic AMOLED 2X (16M Colors) |
| Touch | Yes | Yes |
| Size | 6.83 inches, 1280 x 2772 pixels, 120 Hz | 6.8 inches, 1440 x 3200 pixels, 120 Hz |
| Aspect Ratio | 20.1:9 | 20:9 |
| PPI | ~ 447 PPI | ~ 515 PPI |
| Screen to Body Ratio | ~ 89.6% | ~ 89.8% |
| Glass Type | Corning Gorilla Glass Victus 2 | Corning Gorilla Glass Victus |
| Brightness | 3200 nits Peak, HBM 1800 nits | |
| HDR Support | Yes, HDR10+, Dolby Vision | Yes, HDR10+ |
| Features | 3840Hz PWM, HDR10+, Dolby Vision, Colour depth: 12bit Contrast ratio: 8,000,000:1 DCI- P3 wide color gamut | Always-on Display, HDR10+, Curved Display |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Curved Display | Yes | |
| Memory | ||
| RAM | 12 GB | 12 GB |
| Storage | 256 GB | 256 GB |
| Storage Type | UFS 2.2 | UFS 3.1 |
| Card Slot | No | |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | SA: n1/3/5/8/28/38/40/41/77/78, NSA: n1/3/5/8/28/40/41/77/78 | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | Wi-Fi: Wi-Fi 6/6E/Wi-Fi 5/Wi-Fi 4/Wi-Fi Direct Supports 2.4GHz Wi-Fi | 5GHz Wi-Fi Supports 2x2 MIMO | |
| Bluetooth | Yes, v5.4, A2DP, LE | Yes, v5.2, A2DP, LE |
| USB | Yes, USB-C v2.0 | Yes, USB-C v3.2 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging |
| IR Blaster | Yes | |
| Performance | ||
| AnTuTu Score | 1,053,798 (Total) (v11) 405,501 (CPU) 188,358 (GPU) 203,399 (Memory) 256,540 (UX) | |
| AnTuTu Storage Score | 85,008 Sequential Read: 1093 MB/s; Sequential Write: 1054 MB/s | |
| Geekbench Score | 3,250 (Multi Core) (v6) 1,250 (Single Core) 3,538 (OpenCL) 4,690 (Vulkan) | |
| 3DMark Score | 1,104 (Wild Life Extreme) (6.61 FPS) | |
| Extra | ||
| GPS | GPS | AGPS | Glonass | Beidou | Galileo make wireless Down Wireless network | Data network | Sensor Assisted Positioning | Yes, with A-GPS, GLONASS, BDS, GALILEO |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Proximity sensor | Ambient light sensor | Accelerometer | Electronic compass | IR blaster | Gyroscope | Accelerometer, Gyro, Proximity, Compass, Barometer |
| 3.5mm Headphone Jack | No | No |
| NFC | Yes | Yes |
| AI Features | Al Writing, Al Speech Recognition, Al Interpreter,Al Search, Al Dynamic Wallpapers, Al Creativity Assistant,and more. Circle to Search with Google, Google Gemini information. | |
| Water Resistance | Yes, 1.5 m upto 30 min | Yes, 1.5 m upto 30 min |
| IP Rating | IP66 + IP68 + IP69 + IP69K | IP68 |
| Dust Resistant | Yes | Yes |
| Extra Features | Xiaomi T1S Tuner, Xiaomi Offline Communication | |
| Camera | ||
| Rear Camera | 200 MP ƒ/1.7 (Wide Angle) 23mm (wide), 1/1.4", 0.56µm, multi-directional PDAF, OIS 8 MP ƒ/2.2 (Ultra Wide) 15mm, 120˚ (ultrawide), 1/4.0", 1.12µm | 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 | Auto-HDR, Panorama | |
| Video Recording | 4K @ 30 fps UHD, 1080p @ 60 fps FHD | 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/2.2 (Wide Angle) Punch Hole | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus |
| Front Video Recording | 1080p @ 60 fps FHD | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v15 | Android v10 |
| Custom UI | Xiaomi HyperOS 2 | |
| Chipset | Qualcomm Snapdragon 7s Gen4 | Samsung Exynos 2100 |
| CPU | 2.7 GHz, Octa Core Processor | 2.9 GHz, Octa Core Processor |
| Core Details | 1x2.7 GHz Cortex-A720 & 3x2.4 GHz Cortex-A720 & 4x1.8 GHz Cortex-A520 | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 |
| GPU | Adreno 810 | Mali-G78 MP14 |
| Java | No | No |
| Browser | Yes, supports HTML5 | Yes |
| Multimedia | ||
| Yes | Yes | |
| Music | MP3, AMR, FLAC, APE | Yes |
| Video | MP4, M4V, MKV, XVID | Yes |
| FM Radio | No | No |
| Speaker Type | Dual Stereo | |
| Audio Features | 400% Volume Boost, Dolby Atmos | Hi-Res | |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 6500 mAh, Silicon-Carbon Battery Battery | 5000 mAh, Li-Po Battery |
| Fast Charging | Yes, 100W Fast Charging | Yes, 25W Fast Charging |
| Wireless Charging | Yes, 15W | |
| Reverse Charging | Yes, 22.5W | Yes, 4.5W |