Samsung Galaxy S21 vs Samsung Galaxy S25 Ultra
Quick Comparison
Samsung Galaxy S25 Ultra has better RAM than Samsung Galaxy S21. In terms of display resolution, Samsung Galaxy S25 Ultra has better resolution of 3120 x 1440 than Samsung Galaxy S21 which has resolution of 2400 x 1080. Samsung Galaxy S25 Ultra has more internal memory than Samsung Galaxy S21
| Name | Samsung Galaxy S21 | Samsung Galaxy S25 Ultra |
| RAM | 8 GB | 12 GB |
|---|---|---|
| Display | 6.2 in | 6.9 in |
| Internal Memory | 128 GB | 256 GB |
| Battery | 4000 mAh | 5000 mAh |
| Camera | 64 MP + 12 MP + 12 MP Triple | 200 MP Quad |
| Price | Rs. 69999 | Rs. 129999 |
Related Products
Detailed Comparison
Price And Launch
The launch Date of the first phone is January 14, 2021. The cost of Samsung Galaxy S21 is Rs. 69999. The launch Date of the second phone is January 22, 2025. The cost of Samsung Galaxy S25 Ultra is Rs. 129999.
Display comparison
Samsung Galaxy S21 has screen size of 6.2 inches which falls short to Samsung Galaxy S25 Ultra's 6.9 inch screen. Samsung Galaxy S21 has Screen type where as Samsung Galaxy S25 Ultra has LTPO AMOLED Screen type. Samsung Galaxy S25 Ultra has display density of 498 PPI & Samsung Galaxy S21 has only 421 PPI display density. In terms of screen to body ratio, Samsung Galaxy S25 Ultra has better screen to body ratio of ~ 92.5% than Samsung Galaxy S21's ~ 87.2%. Samsung Galaxy S21 has 20:9 aspect ratio where as Samsung Galaxy S25 Ultra has 20.5:9 aspect ratio.
Memory comparison
Samsung Galaxy S25 Ultra's larger 12 GB RAM is better for playing games and all with respect to Samsung Galaxy S21's lower 8 GB RAM. Samsung Galaxy S25 Ultra has more Internal Memory (256 GB) than Samsung Galaxy S21 (128 GB).
Camera comparison
Samsung Galaxy S25 Ultra's 200 MP Quad Rear Camera outshines Samsung Galaxy S21's 64 MP + 12 MP + 12 MP Triple Rear Camera in terms of resolution. Samsung Galaxy S25 Ultra will be better choice if you're looking to click lot of selfies as it has better 12 MP Front Camera in comparison to Samsung Galaxy S21's 10 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.
Related Comparisons
Full Comparison
| Name | Samsung Galaxy S21 | Samsung Galaxy S25 Ultra |
| General | ||
| Model | Galaxy S21 5G | SM-S938B, SM-S938B/DS, SM-S938U, SM-S938U1, SM-S938W, SM-S938N, SM-S9380, SM-S938E, SM-S938E/DS |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | eSIM+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | January 14, 2021 | January 22, 2025 |
| In The Box | Handset, Stylus Pen, Data Cable (Type C to C), Sim Ejection Pin | |
| Design | ||
| Dimensions | 71.2 x 151.7 x 7.9 mm | 77.6 x 162.8 x 8.2 mm |
| Weight | 169 g | 218 g |
| Bezel less | No | |
| Colors | Titanium Silverblue, Titanium Black, Titanium Whitesilver, Titanium Gray | |
| Display | ||
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color LTPO AMOLED Screen (1B Colors) |
| Touch | Yes | Yes |
| Size | 6.2 inches, 1080 x 2400 pixels, 120 Hz | 6.9 inches, 1440 x 3120 pixels, 120 Hz |
| Aspect Ratio | 20:9 | 20.5:9 |
| PPI | ~ 421 PPI | ~ 498 PPI |
| Screen to Body Ratio | ~ 87.2% | ~ 92.5% |
| Glass Type | Corning Gorilla Glass Victus | Corning Gorilla Armor 2 |
| Features | Always-on Display, HDR10+ | HDR10+, 2600 nits (peak) |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Curved Display | No | |
| Memory | ||
| RAM | 8 GB | 12 GB |
| Storage | 128 GB | 256 GB |
| Storage Type | UFS 3.1 | UFS 4.0 |
| Card Slot | No | No |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | TDD Sub6: N38(2600), N40(2300), N41(2500), N77(3700), N78(3500), FDD Sub6: N1(2100), N2(1900), N3(1800), N5(850), N7(2600), N8(900), N12(700), N20(800), N25(1900), N26(850), N28(700), N66(AWS-3) | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Vo5G | Yes | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | Wi-Fi 7, 802.11a/b/g/n/ac/ax/be 2.4GHz+5GHz+6GHz, EHT320, MIMO, 4096-QAM | |
| Bluetooth | Yes, v5.0, A2DP, LE | Yes, v5.4 |
| USB | Yes, USB-C v3.2 | Yes, USB-C v3.2 |
| USB Features | USB on-the-go, USB Charging | USB Tethering, USB on-the-go, USB Charging |
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes with A-GPS, Glonass, Beidou, Galileo, QZSS |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Hall Sensor, Light Sensor, Proximity Sensor |
| 3.5mm Headphone Jack | No | No |
| NFC | Yes | Yes |
| Water Resistance | Yes, 1.5 m upto 30 min | Yes, 1.5 m upto 30 min |
| IP Rating | IP68 | IP68 |
| Dust Resistant | Yes | Yes |
| Extra Features | Photo Assist, Notes Assist, Drawing Assist, Circle to Search, Google Gemini (AI Mobile), 7 Years of Major OS Updates and 7 Years of Security Updates, Titanium Frame, Samsung Care+, Samsung Health, Samsung Wallet, S Pen Included | |
| Camera | ||
| Rear Camera | 12 MP ƒ/1.8 (Wide Angle) 64 MP ƒ/2 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 200 MP ƒ/1.7 (Wide Angle) 24mm (wide), 1/1.3", 0.6µm, multi-directional PDAF, OIS 10 MP ƒ/2.4 (Telephoto) 67mm (telephoto), 1/3.52", 1.12µm, PDAF, OIS, 3x optical zoom 50 MP ƒ/3.4 (Telephoto) 111mm (periscope telephoto), 1/2.52", 0.7µm, PDAF, OIS, 5x optical zoom 50 MP ƒ/1.9 (Ultra Wide) 120˚ (ultrawide), 0.7µm, dual pixel PDAF, Super Steady video |
| Auto Focus | Yes | |
| Features | Auto-HDR, Panorama | Bixby Vision, Dual Recording, Food, Hyperlapse, Night, Panorama, Photo, Portrait, Portrait Video, Pro, Pro Video, Single Take, Slow Motion, Video, Upto 100X Digital Zoom |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 8K @ 24/30 fps UHD, 4K @ 60 fps UHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 10 MP ƒ/2.2 (Wide Angle) Punch Hole | 12 MP ƒ/2.2 (Wide Angle) Punch Hole, Screen Flash |
| Front Video Recording | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD | 4K @ 60 fps UHD, 1080p @ 60 fps FHD |
| Technical | ||
| OS | Android v10 | Android v15 |
| Custom UI | One UI 7 | |
| Chipset | Samsung Exynos 2100 | Qualcomm Snapdragon 8Elite |
| CPU | 2.9 GHz, Octa Core Processor | 4.47 GHz, Octa Core Processor |
| Core Details | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 | 2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M |
| GPU | Mali-G78 MP14 | Adreno 830 |
| Java | No | No |
| Browser | Yes | Yes |
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | Yes |
| Video | Yes | Yes |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 4000 mAh, Li-Po Battery | 5000 mAh, Li-ion Battery |
| Fast Charging | Yes, 25W Fast Charging | Yes, 45W Fast Charging |
| Wireless Charging | Yes, 15W | Yes, 15W |
| Reverse Charging | Yes, 4.5W | Yes, 10W |
| Reverse Wireless Charging | Yes, 4.5 | |
| Video Playback Time | 31 hours | |