Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) vs Xiaomi Redmi Note 15 5G
Here you can compare Samsung Galaxy S21 Ultra 5G (12GB RAM … and Xiaomi Redmi Note 15 5G. Comparing Samsung Galaxy S21 Ultra 5G (12GB RAM … vs Xiaomi Redmi Note 15 5G on Smartprix enables you to check their respective specs scores and unique features. It would potentially help you understand how Samsung Galaxy S21 Ultra 5G (12GB RAM … stands against Xiaomi Redmi Note 15 5G and which one should you buy The current lowest price found for Samsung Galaxy S21 Ultra 5G (12GB RAM … is ₹1,01,999 and for Xiaomi Redmi Note 15 5G is ₹28,999. The details of both of these products were last updated on Oct 05, 2026.
| Specification | Samsung Galaxy S21 Ultra 5G (12GB RAM … | Xiaomi Redmi Note 15 5G |
|---|---|---|
| Internal Memory | 128 GB | 128 GB |
| OS | Android v10 | Android v15 |
| Battery | 5000 mAh, Li-Po Battery | 5520 mAh |
| Display | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.77 inches, 1080 x 2392 pixels, 120 Hz |
| 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) |
| Price | ₹1,01,999 | ₹28,999 |
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Overview
| Specs Score | 80 / 100 Better Specs | 70 / 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) | |
| HDR Support | Yes, HDR10+ | |
| 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 |
| Front Camera Features | Dual video call, Auto-HDR | HDR, panorama |
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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