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Compare features, prices and ratings to find the perfect phone for you.
Our Verdict
Analysis
Samsung Galaxy S25 Ultra has the bigger display.
Overall Winner
Samsung Galaxy S25 Ultra
Display Winner
Samsung Galaxy S25 Ultra
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie
Specifications Comparison
| Feature | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy S25 Ultra |
|---|---|---|
| Display size (in) | 6.80 | 6.90 |
| Charging (W) | 25 | 45 |
| Main camera (MP) | 108.00 | 200.00 |
| Selfie (MP) | 40.00 | 12.00 |
| Weight (g) | 227 | 218 |
| Thickness (mm) | 8.90 | 8.20 |
| Chipset | Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China | Snapdragon 8 Elite |
| OS | Android 11, up to 4 major Android upgrades, One UI 7 | Android 15 |
Pros & Cons
Samsung Galaxy S21 Ultra 5G
Samsung Galaxy S25 Ultra
- Brilliant display
- Versatile camera system
- Long update commitment
- Productivity features
- Premium pricing
- Bulky design
- Slow charging vs Chinese rivals
Every Spec, Side by Side
Specification
Samsung
Samsung Galaxy S21 Ultra 5G
Samsung
Samsung Galaxy S25 Ultra
Battery 3 specs
Type
Li-Ion 5000 mAh
Li-Ion 5000 mAh
Charging
25W wired, PD3.0
15W wireless (Qi)
4.5W reverse wireless
45W wired
Capacity
—
5000 mAh
Body 5 specs
Dimensions
165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in)
162.8 x 77.6 x 8.2 mm
Weight
227 g (Sub6), 229 g (mmWave) (8.01 oz)
218 g
Build
Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame
Glass front (Corning Gorilla Armor 2), glass back (Gorilla Glass Victus 2), titanium frame (grade 5)
SIM
· Nano-SIM + eSIM· Nano-SIM + Nano-SIM + eSIM (max 2 at a time)
· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) - INT· Nano-SIM + eSIM + eSIM (max 2 at a time) - USA· Nano-SIM + Nano-SIM - CN
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Stylus support
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Stylus
Connectivity 7 specs
WLAN
Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Bluetooth
5.2, A2DP, LE
5.4, A2DP, LE
Positioning
GPS, GLONASS, BDS, GALILEO
GPS, GLONASS, BDS, GALILEO, QZSS
NFC
Yes
Yes
Radio
FM radio (Snapdragon model only; market/operator dependent)
No
USB
USB Type-C 3.2, OTG
USB Type-C 3.2, DisplayPort 1.2, OTG
5G
—
Yes
Display 5 specs
Type
Dynamic AMOLED 2X, 120Hz, HDR10+, 1500 nits (peak)
Dynamic AMOLED 2X
Size
6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio)
6.9 inches
Resolution
1440 x 3200 pixels, 20:9 ratio (~515 ppi density)
1440 x 3120 pixels
Protection
Corning Gorilla Glass Victus
Corning Gorilla Armor 2, Mohs level 6
—
DX anti-reflective coating
Features 2 specs
Sensors
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Samsung DeX, Samsung Wireless DeX (desktop experience support)
Ultra Wideband (UWB) support
Samsung DeX, Samsung Wireless DeX (desktop experience support)
Ultra Wideband (UWB) support
Launch 2 specs
Announced
2021, January 14
2025, January 22
Status
Available. Released 2021, January 29
Available. Released 2025, February 03
Main Camera 3 specs
Quad
108 MP, f/1.8, 24mm (wide), 1/1.33", 0.8µm, PDAF, OIS
10 MP, f/2.4, 72mm (telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 3x optical zoom
10 MP, f/4.9, 240mm (periscope telephoto), 1/3.24", 1.22µm, dual pixel PDAF, OIS, 10x optical zoom
12 MP, f/2.2, 13mm (ultrawide), 1/2.55", 1.4µm, dual pixel PDAF, Super Steady video
200 MP + 50 MP + 50 MP + 10 MP
Features
Laser AF, LED flash, auto-HDR, panorama
Laser AF, Best Face, LED flash, auto-HDR, panorama
Video
8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
8K@24/30fps, 4K@30/60/120fps, 1080p@30/60/120/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS
Memory 5 specs
Card slot
No
No
Internal
128GB 8GB RAM, 128GB 12GB RAM, 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM
256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 1TB 16GB RAM
UFS 3.1
UFS 4.0
RAM
—
12GB
Storage
—
256GB
Misc 5 specs
Colors
Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy
Titanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink Gold
Models
SM-G998B, SM-G998B/DS, SM-G998U, SM-G998U1, SM-G998W, SM-G998N, SM-G9980
SM-S938B, SM-S938B/DS, SM-S938U, SM-S938U1, SM-S938W, SM-S938N, SM-S9380, SM-S938E, SM-S938E/DS
SAR
0.77 W/kg (head) 1.02 W/kg (body)
1.26 W/kg (head) 0.64 W/kg (body)
SAR EU
0.71 W/kg (head) 1.58 W/kg (body)
1.25 W/kg (head) 1.42 W/kg (body)
Price
$ 254.95 / £ 214.99 / € 247.17
$ 806.08 / C$ 1,149.00 / £ 689.99 / € 840.00 / ₹ 99,990
Network 7 specs
Technology
GSM / CDMA / HSPA / EVDO / LTE / 5G
GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 - SM-G998B
1, 2, 5, 7, 25, 28, 41, 66, 71, 77, 78, 257, 258, 260, 261 SA/NSA/Sub6/mmWave - USA unlocked
3G bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International
5G bands
2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G998U1
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International
Speed
HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
HSPA, LTE (CA), 5G
Our Tests 6 specs
Performance
AnTuTu: 657150 (v8)
GeekBench: 3518 (v5.1)
GFXBench: 33fps (ES 3.1 onscreen)
AnTuTu: 2207809 (v10)
GeekBench: 9846 (v6)
3DMark: 6687 (Wild Life Extreme)
Display
1023 nits max brightness (measured)
1417 nits max brightness (measured)
Camera
Photo / Video
—
Loudspeaker
-25.5 LUFS (Very good)
-24.6 LUFS (Very good)
Battery (old)
Endurance rating 114h
—
Battery
—
Active use score 14:49h
Platform 4 specs
OS
Android 11, up to 4 major Android upgrades, One UI 7
Android 15
Chipset
Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
Snapdragon 8 Elite
CPU
Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China
Octa-core (2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Mali-G78 MP14 - InternationalAdreno 660 - USA/China
Adreno 830 (1200 MHz)
Selfie Camera 3 specs
Single
40 MP, f/2.2, 26mm (wide), 1/2.8", 0.7µm, PDAF
12 MP
Features
HDR
HDR, HDR10+
Video
4K@30/60fps, 1080p@30fps
4K@30/60fps, 1080p@30fps
Sound 3 specs
Loudspeaker
Yes, with stereo speakers
Yes, with stereo speakers
3.5mm jack
No
No
High-bitrate audio support
High-bitrate audio support
Eu Label 4 specs
Energy
—
Class B
Battery
—
44:54h endurance, 2000 cycles
Free fall
—
Class A (270 falls)
Repairability
—
Class C
Similar Comparisons
Common Questions
Which phone is the best in this comparison?
Samsung Galaxy S25 Ultra has the bigger display.
How are the comparison winners decided?
We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".
Which is more affordable?
The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.