Xiaomi Redmi Note 15 5G vs Samsung Galaxy S21 Ultra 5G (16GB RAM + 512GB)
Here you can compare Xiaomi Redmi Note 15 5G and Samsung Galaxy S21 Ultra 5G (16GB RAM …. Comparing Xiaomi Redmi Note 15 5G vs Samsung Galaxy S21 Ultra 5G (16GB RAM … on Smartprix enables you to check their respective specs scores and unique features. It would potentially help you understand how Xiaomi Redmi Note 15 5G stands against Samsung Galaxy S21 Ultra 5G (16GB RAM … and which one should you buy The current lowest price found for Xiaomi Redmi Note 15 5G is ₹28,999 and for Samsung Galaxy S21 Ultra 5G (16GB RAM … is ₹1,11,999. The details of both of these products were last updated on Aug 23, 2026.
| Specification | Xiaomi Redmi Note 15 5G | Samsung Galaxy S21 Ultra 5G (16GB RAM … |
|---|---|---|
| Battery | 5520 mAh | 5000 mAh, Li-Po Battery |
| CPU | 2.4 GHz, Octa Core Processor | 2.9 GHz, Octa Core Processor |
| Display | 6.77 inches, 1080 x 2392 pixels, 120 Hz | 6.8 inches, 1440 x 3200 pixels, 120 Hz |
| Rear Camera | 108 MP ƒ/1.7 (Wide Angle) 0.64um, 9 in 1 1.92um 8 MP ƒ/2.2 (Ultra Wide) | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) |
| RAM | 8 GB | 16 GB |
| Price | ₹28,999 | ₹1,11,999 |
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Overview
| Specs Score | 70 / 100 | 83 / 100 Better Specs |
| Display Resolution | 1080 x 2392 pixels | 1440 x 3200 pixels Better Resolution |
| RAM | 8 GB | 16 GB More RAM |
| Storage | 128 GB | 512 GB More Storage |
| CPU Clock Speed | 2.4 GHz | 2.9 GHz Faster Clock Speed |
| Front Camera | 20 MP | 40 MP Better Front Camera Resolution |
| Weight | 178 g Lighter | 227 g |
| Thickness | 7.35 mm Slimmer | 8.9 mm |
| Battery | 5520 mAh Bigger Battery | 5000 mAh |
| Unique Features | Memory Card Support No IR Blaster | No Wireless Charging No |
General
| Country of Origin | India | |
| Model | 25096RA9BG, 25098RA98G | Galaxy S21 Ultra 5G |
| Sim Type | Dual Sim, GSM+GSM (Hybrid Slot) | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | December 18, 2025 | January 14, 2021 |
| In The Box | REDMI Note 15 5G / USB Type-C Cable / SIM Eject Tool/ Protective Case / Quick Start Guide / Warranty Card |
Design
| Dimensions | 75.4 x 164 x 7.35 mm | 75.6 x 165.1 x 8.9 mm |
| Weight | 178 g | 227 g |
| Colors | Black, Glacier Blue, Mist Purple |
Display
| Type | Color AMOLED Screen (68B) | Color Dynamic AMOLED 2X (16M Colors) |
| Touch | Yes, 240 Hz Touch Sampling Rate | Yes |
| Size | 6.77 inches, 1080 x 2392 pixels, 120 Hz | 6.8 inches, 1440 x 3200 pixels, 120 Hz |
| Aspect Ratio | 20.5:9 | 20:9 |
| PPI | ~ 388 PPI | ~ 515 PPI |
| Screen to Body Ratio | ~ 89.7% | ~ 89.8% |
| Glass Type | Scratch/drop-resistant glass, Mohs level 5 | Corning Gorilla Glass Victus |
| Brightness | 3200nits peak brightness, 800nits (typ) | |
| HDR Support | Yes, HDR10+ | |
| Features | 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 | Always-on Display, HDR10+ |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
Memory
| RAM | 8 GB | 16 GB |
| RAM Type | LPDDR4X | |
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 128 GB | 512 GB |
| Storage Type | UFS 2.2 | UFS 3.1 |
| 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, v5.3, 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 |
Extra
| GPS | GPS: L1 | GLONASS: G1 | BDS: B1I + B1C | Galileo: E1 | Yes, with A-GPS, GLONASS, BDS, GALILEO |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Virtual 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 | Gemini Live, Circle to Search | |
| Water Resistance | Yes, 1.7 m | Yes, 1.5 m upto 30 min |
| IP Rating | IP65 + IP66 | IP68 |
| Dust Resistant | Yes | Yes |
Camera
| Rear Camera | 108 MP ƒ/1.7 (Wide Angle) 0.64um, 9 in 1 1.92um 8 MP ƒ/2.2 (Ultra Wide) | 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 | |
| Auto Focus | Yes | Yes |
| Features | HDR, Panorama | Auto-HDR, Panorama |
| Video Recording | 4K @ 30 fps UHD, 1080p @ 30 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 | 20 MP ƒ/2.2 (Wide Angle) Punch Hole, Screen Flash | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus |
| Front Video Recording | 1080p @ 30 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 6 Gen3 | Samsung Exynos 2100 |
| CPU | 2.4 GHz, Octa Core Processor | 2.9 GHz, Octa Core Processor |
| Core Details | 2xCortex-A76@2.2 GHz & 6x Cortex-A55@2.0 GHz | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 |
| GPU | Adreno 710 | Mali-G78 MP14 |
| Java | No | No |
| Browser | Yes | 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 | 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 | 5520 mAh | 5000 mAh, Li-Po Battery |
| Fast Charging | Yes, 45W Fast Charging | Yes, 25W Fast Charging |
| Wireless Charging | Yes, 15W | |
| Reverse Charging | Yes, 18W | Yes, 4.5W |
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