Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) vs Xiaomi Redmi Note 15 5G
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Overview
| Specs Score | 91 / 100 Better Specs | 85 / 100 |
| Display Resolution | 1440 x 3200 pixels Better Resolution | 1080 x 2392 pixels |
| RAM | 12 GB More RAM | 8 GB |
| CPU Clock Speed | 2.9 GHz Faster Clock Speed | 2.4 GHz |
| Front Camera | 40 MP Better Front Camera Resolution | 20 MP |
| Weight | 227 g | 178 g Lighter |
| Thickness | 8.9 mm | 7.35 mm Slimmer |
| Battery | 5000 mAh | 5520 mAh Bigger Battery |
| Unique Features | No Wireless Charging No | Memory Card Support No IR Blaster |
General
| Country of Origin | India | |
| Model | Galaxy S21 Ultra 5G | 25096RA9BG, 25098RA98G |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM (Hybrid Slot) |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | January 14, 2021 | December 18, 2025 |
| In The Box | REDMI Note 15 5G / USB Type-C Cable / SIM Eject Tool/ Protective Case / Quick Start Guide / Warranty Card |
Design
| Dimensions | 75.6 x 165.1 x 8.9 mm | 75.4 x 164 x 7.35 mm |
| Weight | 227 g | 178 g |
| Colors | Black, Glacier Blue, Mist Purple |
Display
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color AMOLED Screen (68B) |
| Touch | Yes | Yes, 240 Hz Touch Sampling Rate |
| Size | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.77 inches, 1080 x 2392 pixels, 120 Hz |
| Aspect Ratio | 20:9 | 20.5:9 |
| PPI | ~ 515 PPI | ~ 388 PPI |
| Screen to Body Ratio | ~ 89.8% | ~ 89.7% |
| Glass Type | Corning Gorilla Glass Victus | Scratch/drop-resistant glass, Mohs level 5 |
| Brightness | 3200nits peak brightness, 800nits (typ) | |
| Features | Always-on Display, HDR10+ | Contrast Ratio: 8,000,000:1, DCI- P3 wide Color Gamut, Sunlight Display, Reading Mode, 3840Hz PWM Dimming | 16,000-level Brightness Adjustment, TÜV Rheinland Low Blue Light, (Hardware Solution) Certified, TUV Rheinland Circadian Friendly Certified, TÜV Rheinland Flicker Free Certified |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
Memory
| RAM | 12 GB | 8 GB |
| RAM Type | LPDDR4X | |
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 128 GB | 128 GB |
| Storage Type | UFS 3.1 | UFS 2.2 |
| Card Slot | Yes, (Hybrid Slot), upto 1 TB |
Connectivity
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | 5G NSA:n1|n3|n40|n78 5G SA: n1|n3|n5|n8|n28|n40|n78 | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Bluetooth | Yes, v5.2, A2DP, LE | Yes, v5.3, A2DP, LE |
| USB | Yes, USB-C v3.2 | 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 | GPS: L1 | GLONASS: G1 | BDS: B1I + B1C | Galileo: E1 |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Virtual proximity sensor | Ambient light sensor | Accelerometer | Electronic compass | IR blaster | Gyroscope |
| 3.5mm Headphone Jack | No | No |
| NFC | Yes | Yes |
| AI Features | Gemini Live, Circle to Search | |
| Water Resistance | Yes, 1.5 m upto 30 min | Yes, 1.7 m |
| IP Rating | IP68 | IP65 + IP66 |
| Dust Resistant | Yes | Yes |
Camera
| Rear Camera | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 108 MP ƒ/1.7 (Wide Angle) 0.64um, 9 in 1 1.92um 8 MP ƒ/2.2 (Ultra Wide) |
| OIS | Yes | |
| Auto Focus | Yes | Yes |
| Features | Auto-HDR, Panorama | HDR, Panorama |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 4K @ 30 fps UHD, 1080p @ 30 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus | 20 MP ƒ/2.2 (Wide Angle) Punch Hole, Screen Flash |
| Front Video Recording | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD | 1080p @ 30 fps FHD |
Technical
| OS | Android v10 | Android v15 |
| Custom UI | Xiaomi HyperOS 2 | |
| Chipset | Samsung Exynos 2100 | Qualcomm Snapdragon 6 Gen3 |
| CPU | 2.9 GHz, Octa Core Processor | 2.4 GHz, Octa Core Processor |
| Core Details | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 | 2xCortex-A76@2.2 GHz & 6x Cortex-A55@2.0 GHz |
| GPU | Mali-G78 MP14 | Adreno 710 |
| Java | No | No |
| Browser | Yes | Yes |
Multimedia
| Yes | Yes | |
| Music | Yes | MP3, AMR, FLAC, APE |
| Video | Yes | MP4, M4V, MKV, XVID |
| FM Radio | No | No |
| Speaker Type | Dual Stereo | |
| Audio Features | Dual Ultra-Linear Speakers, Misound tuning and Dolby Atmos | |
| Audio Jack Type | USB Type-C | |
| Document Reader | Yes | Yes |
Battery
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 5000 mAh, Li-Po Battery | 5520 mAh |
| Fast Charging | Yes, 25W Fast Charging | Yes, 45W Fast Charging |
| Wireless Charging | Yes, 15W | |
| Reverse Charging | Yes, 4.5W | Yes, 18W |
Discuss
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