Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 (256GB)
Here you can compare Samsung Galaxy S21 Ultra and Samsung Galaxy S25 (256GB). Comparing Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 (256GB) on Smartprix enables you to check their respective specs scores and unique features. It would potentially help you understand how Samsung Galaxy S21 Ultra stands against Samsung Galaxy S25 (256GB) and which one should you buy The current lowest price found for Samsung Galaxy S21 Ultra is $399 and for Samsung Galaxy S25 (256GB) is $859.99. The details of both of these products were last updated on Nov 08, 2025.
| Specification | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 (256GB) |
|---|---|---|
| RAM | 12 GB | 12 GB |
| Internal Memory | 256 GB | 256 GB |
| Battery | 5000 mAh, Li-Po Battery | 4000 mAh, Li-ion Battery |
| Display | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.2 inches, 1080 x 2340 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) | 50 MP ƒ/1.8 (Wide Angle) 24mm (wide), 1/1.56", 1.0µm, dual pixel PDAF, OIS 10 MP ƒ/2.4 (Telephoto) 67mm (telephoto), 1/3.94", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP ƒ/2.2 (Ultra Wide) 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video |
| Price | $399 | $859.99 |
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Overview
| Specs Score | 93 / 100 Better Specs | 91 / 100 |
| Display Size | 6.8 in Bigger Display | 6.2 in |
| Display Resolution | 1440 x 3200 pixels Better Resolution | 1080 x 2340 pixels |
| CPU Clock Speed | 2.9 GHz | 4.47 GHz Faster Clock Speed |
| Rear Camera | 108 MP Quad Better Camera Resolution | 50 MP + 12 MP + 10 MP Triple |
| Front Camera | 40 MP Better Front Camera Resolution | 12 MP |
| Weight | 227 g | 162 g Lighter |
| Thickness | 8.9 mm | 7.2 mm Slimmer |
| Battery | 5000 mAh Bigger Battery | 4000 mAh |
General
| Country of Origin | South Korea | |
| Model | Galaxy S21 Ultra 5G | SM-S931ULBEXAA |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | SIM 1 + eSIM / Dual eSIM |
| Device Type | Smartphone | Smartphone |
| Release Date | January 14, 2021 | January 22, 2025 |
| In The Box | USB-C Cable, SIM Tray Ejector, Samsung Galaxy S25, Quick Start Guide |
Design
| Dimensions | 75.6 x 165.1 x 8.9 mm | 70.5 x 146.9 x 7.2 mm |
| Weight | 227 g | 162 g |
| Bezel less | Yes | |
| Colors | Icy Blue, Mint, Navy, Silver Shadow |
Display
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color Dynamic AMOLED 2X (16M Colors) |
| Touch | Yes | Yes |
| Size | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.2 inches, 1080 x 2340 pixels, 120 Hz |
| Aspect Ratio | 20:9 | 20.5:9 |
| PPI | ~ 515 PPI | ~ 416 PPI |
| Screen to Body Ratio | ~ 89.8% | ~ 91.1% |
| Glass Type | Corning Gorilla Glass Victus | Corning Gorilla Glass Victus 2 |
| Features | Always-on Display, HDR10+, Curved Display | HDR10+, 2600 nits (peak) |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Curved Display | Yes |
Memory
| RAM | 12 GB | 12 GB |
| Storage | 256 GB | 256 GB |
| Storage Type | UFS 3.1 | UFS 4 |
Connectivity
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| 5G Bands | 5G FDD Sub6L: N1(2100), N2(1900), N5(850), N7(2600), N25(1900), N28(700), N66(AWS-3), N71(600), 5G TDD Sub6: N257(28GHz), N258(26GHz), N260(39GHz), N261(28GHz), 5G TDD mmWave: N41(2500), N77(3700), N78(3500) | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Vo5G | Yes | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Wifi Version | 802.11a/b/g/n/ac/ax/be 2.4GHz+5GHz+6GHz, EHT320, MIMO, 4096-QAM | |
| Bluetooth | Yes, v5.2, A2DP, LE | Yes, v5.4, A2DP, LE |
| USB | Yes, USB-C v3.2 | Yes, USB-C USB 3.2 Gen 1 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging |
Extra
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with GPS, Glonass, Beidou, Galileo |
| 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), Samsung Care+, Samsung Health, Samsung Wallet |
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/1.8 (Wide Angle) 24mm (wide), 1/1.56", 1.0µm, dual pixel PDAF, OIS 10 MP ƒ/2.4 (Telephoto) 67mm (telephoto), 1/3.94", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP ƒ/2.2 (Ultra Wide) 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video |
| OIS | Yes | Yes |
| Auto Focus | Yes | Yes |
| Features | Auto-HDR, Panorama | Optical Zoom 3x, Optical quality Zoom 2x (Enabled by Adaptive Pixel sensor) , Digital Zoom up to 30x |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 4K @ 60 fps UHD, 8K @ 30 fps UHD, 1080p @ 60 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus | 12 MP ƒ/2.2 (Wide Angle) Punch Hole |
| 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 | OneUI 7 | |
| Chipset | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Elite for Galaxy |
| 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 | MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA, DFF, DSF, APE |
| Video | Yes | MP4, M4V, 3GP, 3G2, AVI, FLV, MKV, WEBM |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
Battery
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 5000 mAh, Li-Po Battery | 4000 mAh, Li-ion Battery |
| Fast Charging | Yes, 25W Fast Charging | Yes, 25W Fast Charging |
| Wireless Charging | Yes, 15W | Yes, 15W |
| Reverse Charging | Yes, 4.5W | Yes |
| Reverse Wireless Charging | Yes, 4.5W |
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