Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) vs Xiaomi Redmi 15 5G
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Overview
| Specs Score | 80 / 100 Better Specs | 61 / 100 |
| Display Resolution | 1440 x 3200 pixels Better Resolution | 1080 x 2340 pixels |
| Screen To Body Ratio | ~ 89.8% Less Bezels | ~ 83.2% |
| RAM | 12 GB More RAM | 6 GB |
| CPU Clock Speed | 2.9 GHz Faster Clock Speed | 2.3 GHz |
| Rear Camera | 108 MP Quad Better Camera Resolution | 50 MP Dual |
| Front Camera | 40 MP Better Front Camera Resolution | 8 MP |
| Thickness | 8.9 mm | 8.4 mm Slimmer |
| Battery | 5000 mAh | 7000 mAh Bigger Battery |
| Unique Features | No Water Resistant NFC No Wireless Charging No | FM Radio No No Memory Card Support No IR Blaster |
General
| Country of Origin | India | |
| Model | Galaxy S21 Ultra 5G | 15 5G |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM (Hybrid Slot) |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| OS Updates | 2 years | |
| Security Updates | 4 years | |
| Release Date | January 14, 2021 | August 01, 2025 |
| In The Box | Mobile Phone * 1, Adapter * 1, USB Type-C cable * 1, SIM Eject Tool * 1, Quick Start Guide, & Warranty Card * 1, Safety Information * 1 |
Design
| Dimensions | 75.6 x 165.1 x 8.9 mm | 80.45 x 168.48 x 8.4 mm |
| Weight | 227 g | 217 g |
| Colors | Sandy Purple, Frosted White, Midnight Black |
Display
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color IPS Screen (16M Colors) |
| Touch | Yes | Yes, 288 Hz Touch Sampling Rate |
| Size | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.9 inches, 1080 x 2340 pixels, 144 Hz |
| Aspect Ratio | 20:9 | 20.6:9 |
| PPI | ~ 515 PPI | ~ 374 PPI |
| Screen to Body Ratio | ~ 89.8% | ~ 83.2% |
| Glass Type | Corning Gorilla Glass Victus | |
| Brightness | 850nits Peak Brightness | |
| HDR Support | Yes, HDR10+ | |
| Features | Always-on Display, HDR10+ | TÜV Rheinland Circadian Friendly, TÜV Rheinland flicker free, TÜV Rheinland Low Blue light |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
Memory
| RAM | 12 GB | 6 GB |
| RAM Type | LPDDR4X | |
| 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 | SA: n1/n3/n5/n8/n28/n40/n78, NSA: n1/n3/n40/n78/n8 | |
| VoLTE | Yes, Dual Stand-By | Yes |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Bluetooth | Yes, v5.2, A2DP, LE | Yes, v5.1, A2DP, LE |
| USB | Yes, USB-C v3.2 | Yes, USB-C |
| 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 | Yes, with A-GPS, Glonass, Beidou |
| Fingerprint Sensor | Yes, In Display | Yes, Side |
| Face Unlock | Yes | Yes |
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Ambient Light Sensor, Proximity Sensor (Virtual), E Compass, Accelerometer |
| 3.5mm Headphone Jack | No | |
| NFC | Yes | |
| AI Features | Circle to Search, Gemini AI, AI Erase | |
| Water Resistance | Yes, 1.5 m upto 30 min | |
| Splash Resistant | Yes | |
| IP Rating | IP68 | IP64 |
| Dust Resistant | Yes | Yes |
| Extra Features | Hydro Touch |
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) | 50 MP ƒ/1.75 (Wide Angle) |
| OIS | Yes | |
| Auto Focus | Yes | Yes |
| Features | Auto-HDR, Panorama | AI Sky, AI Erase, Classic Film Filters |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 1080p @ 30 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus | 8 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 |
Technical
| OS | Android v10 | Android v15 |
| Custom UI | HyperOS 2 | |
| Chipset | Samsung Exynos 2100 | Qualcomm Snapdragon 6s Gen3 |
| CPU | 2.9 GHz, Octa Core Processor | 2.3 GHz, Octa Core Processor |
| Core Details | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 | 2x2.3 GHz Cortex-A78 & 6x2.0 GHz Cortex-A55 |
| GPU | Mali-G78 MP14 | Adreno 619 |
| Java | No | No |
| Browser | Yes | Yes, supports HTML5 |
Multimedia
| Yes | Yes | |
| Music | Yes | Yes |
| Video | Yes | Yes |
| FM Radio | No | Yes |
| Speaker Type | Bottom Firing Loud Speaker | |
| Audio Features | Dolby Certified, 200% Super Volume | |
| Document Reader | Yes | Yes |
Battery
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 5000 mAh, Li-Po Battery | 7000 mAh, Si-C EV-Grade Technology |
| Fast Charging | Yes, 25W Fast Charging | Yes, 33W |
| Wireless Charging | Yes, 15W | |
| Reverse Charging | Yes, 4.5W | Yes, 18W |
Discuss
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