Samsung Galaxy S21 Ultra vs Xiaomi Redmi Note 15 5G
Quick Comparison
Samsung Galaxy S21 Ultra has better RAM than Xiaomi Redmi Note 15 5G. In terms of display resolution, Samsung Galaxy S21 Ultra has better resolution of 3200 x 1440 than Xiaomi Redmi Note 15 5G which has resolution of 2392 x 1080. Samsung Galaxy S21 Ultra has more internal memory than Xiaomi Redmi Note 15 5G
| Name | Samsung Galaxy S21 Ultra | Xiaomi Redmi Note 15 5G |
| RAM | 12 GB | 8 GB |
|---|---|---|
| Display | 6.8 in | 6.77 in |
| Internal Memory | 256 GB | 128 GB |
| Battery | 5000 mAh | 5520 mAh |
| Camera | 108 MP Quad | 108 MP + 8 MP Dual |
| Price | Rs. 47990 | Rs. 22999 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is January 14, 2021. The cost of Samsung Galaxy S21 Ultra is Rs. 47990. The launch Date of the second phone is December 18, 2025. The cost of Xiaomi Redmi Note 15 5G is Rs. 22999.
Display comparison
Xiaomi Redmi Note 15 5G has screen size of 6.77 inches which falls short to Samsung Galaxy S21 Ultra's 6.8 inch screen. Samsung Galaxy S21 Ultra has Screen type where as Xiaomi Redmi Note 15 5G has AMOLED Screen type. Samsung's phone has display density of 515 PPI & Xiaomi's phone has only 388 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 ~ 89.7%. Samsung Galaxy S21 Ultra has 20:9 aspect ratio where as Xiaomi Redmi Note 15 5G has 20.5:9 aspect ratio.
Memory comparison
Samsung Galaxy S21 Ultra's larger 12 GB RAM is better for playing games and all with respect to Xiaomi Redmi Note 15 5G's lower 8 GB RAM. Samsung Galaxy S21 Ultra has more Internal Memory (256 GB) than Xiaomi Redmi Note 15 5G (128 GB).
Camera comparison
They both have the same 108 MP Quad Rear Camera. 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 5G's 20 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 10 and the second one on 15 version.
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Full Comparison
| Name | Samsung Galaxy S21 Ultra | Xiaomi Redmi Note 15 5G |
| 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+, Curved Display | 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 |
| Curved Display | Yes | |
| Memory | ||
| RAM | 12 GB | 8 GB |
| RAM Type | LPDDR4X | |
| Expandable RAM | Upto 8 GB Extra Virtual RAM | |
| Storage | 256 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 |