- android.gs
- Compare
- Galaxy S21 5G vs Galaxy S25 Ultra
Samsung Galaxy S21 5G vs Samsung Galaxy S25 Ultra
What Galaxy S21 5G does better (2) and where Galaxy S25 Ultra wins (27) — every spec side by side.
vs
7.7Display9.1
5.6Performance9.1
7.9Camera9.8
3.8Battery7.1
9.4Features9.8
Dimensions
Size comparison
Galaxy S21 5GGalaxy S25 Ultra
| Galaxy S21 5G | Galaxy S25 Ultra | Difference | |
|---|---|---|---|
| Height | 151.7 mm | 162.8 mm | −11.1 mm |
| Width | 71.2 mm | 77.6 mm | −6.4 mm |
| Thickness | 7.9 mm | 8.2 mm | −0.3 mm |
| Weight | 169 g | 218 g | −49 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Galaxy S21 5G better than Galaxy S25 Ultra?
- Weight169 g vs 218 g+29%
- Thickness7.9 mm vs 8.2 mm+4%
Why is Galaxy S25 Ultra better than Galaxy S21 5G?
- AnTuTu score584,055 vs 2,207,8093.8×
- Geekbench 6 (multi-core)3,238 vs 9,8463×
- Main camera12 MP vs 200 MP16.7×
- RAM8 GB vs 16 GB2×
- 3DMark Wild Life Extreme1,800 vs 6,6873.7×
- Storage (max)256 GB vs 1,024 GB4×
- Optical zoom1.1× vs 5×4.5×
- Wired charging25 W vs 45 W+80%
- Battery capacity4,000 mAh vs 5,000 mAh+25%
- Peak brightness1,300 nits vs 2,600 nits2×
- Major OS updates promised4 vs 7+75%
- Measured brightness856 nits vs 1,417 nits+66%
Specifications
Side by side
| Design | ||
| Weight | 169 g | 218 g |
| Thickness | 7.9 mm | 8.2 mm |
| Height | 151.7 mm | 162.8 mm |
| Width | 71.2 mm | 77.6 mm |
| Frame | Aluminium | Titanium |
| Back | Plastic | Glass |
| Ingress protection | IP68 | IP68 |
| Water resistance (IPx) | IPx8 | IPx8 |
| Glass protection | Corning Gorilla Glass Victus | Corning Gorilla Armor 2 |
| Colours | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink | Titanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink Gold |
| Stylus | — | Yes |
| Display | ||
| Screen size | 6.2″ | 6.9″ |
| Panel | Dynamic AMOLED 2X | Dynamic LTPO AMOLED 2X |
| OLED panel | Yes | Yes |
| LTPO (adaptive 1–120 Hz) | — | Yes |
| Resolution (width) | 1,080 px | 1,440 px |
| Resolution (height) | 2,400 px | 3,120 px |
| Pixel density | 421 ppi | 498 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,300 nits | 2,600 nits |
| Measured brightness | 856 nits | 1,417 nits |
| Screen-to-body ratio | 87.2% | 92.5% |
| HDR | Yes | Yes |
| Performance | ||
| Chipset | Exynos 2100 - International | Qualcomm SM8750-AC Snapdragon 8 Elite |
| Chip maker | Qualcomm | Qualcomm |
| Process | 5 nm | 3 nm |
| CPU cores | 8 | 8 |
| CPU frequency | 2.9 GHz | 4.47 GHz |
| GPU | Mali-G78 MP14 - International Adreno 660 - USA/China | Adreno 830 |
| AnTuTu score | 584,055 | 2,207,809 |
| Geekbench 6 (multi-core) | 3,238 | 9,846 |
| 3DMark Wild Life Extreme | 1,800 | 6,687 |
| Memory | ||
| RAM | 8 GB | 16 GB |
| Storage (max) | 256 GB | 1,024 GB |
| Storage (base) | 128 GB | 256 GB |
| Storage type | UFS 3.1 | UFS 4.0 |
| Memory card slot | No | No |
| Camera | ||
| Main camera | 12 MP | 200 MP |
| Main camera aperture | f/1.8 | f/1.7 |
| Main sensor size | 1/1.76" | 1/1.3" |
| Rear cameras | 3 | 4 |
| Optical stabilisation | Yes | Yes |
| Ultra-wide camera | Yes | Yes |
| Telephoto camera | Yes | Yes |
| Optical zoom | 1.1× | 5× |
| Max video | 8K | 8K |
| 4K video frame rate | 60 fps | 120 fps |
| Selfie camera | 10 MP | 12 MP |
| 4K selfie video | Yes | Yes |
| Battery | ||
| Battery capacity | 4,000 mAh | 5,000 mAh |
| Battery type | Li-Ion | Li-Ion |
| Active use (test) | — | 14.8 h |
| Wired charging | 25 W | 45 W |
| Charged in 30 min | 55% | 65% |
| Wireless charging | Yes | Yes |
| Wireless charging power | 15 W | 15 W |
| Reverse wireless charging | Yes | Yes |
| Connectivity | ||
| 5G | Yes | Yes |
| eSIM | Yes | Yes |
| Dual SIM | Yes | Yes |
| Wi-Fi standard | Wi-Fi 6 | Wi-Fi 7 |
| Bluetooth | 5 | 5.4 |
| NFC | Yes | Yes |
| USB | USB Type-C 3.2 | USB Type-C 3.2 |
| USB version | 3.2 | 3.2 |
| Video output | — | Yes |
| Ultra Wideband | — | Yes |
| Dual-band GPS | — | Yes |
| Satellite navigation | GLONASS, GALILEO, BDS | GLONASS, GALILEO, BDS, QZSS |
| Features | ||
| Stereo speakers | Yes | Yes |
| 3.5 mm headphone jack | No | No |
| Loudspeaker loudness | -26.4 LUFS | -24.6 LUFS |
| Fingerprint sensor | Under display, ultrasonic | Under display, ultrasonic |
| Barometer | Yes | Yes |
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
| SAR (head) | 0.46 W/kg | 1.25 W/kg |
| Software | ||
| OS at launch | Android 11 | Android 15 |
| Platform | Android | Android |
| Interface | One UI 7 | One UI 9 |
| Major OS updates promised | 4 | 7 |
| EU label | ||
| Energy class | — | B |
| Battery charge cycles | — | 2,000 |
| Endurance per cycle | — | 45 h |
| Repairability class | — | C |
| Drop resistance class | — | A |
Related comparisons
vs
Samsung Galaxy S21 5GvsSamsung Galaxy S22 5G7.98.3vs
Samsung Galaxy S21 5GvsXiaomi Redmi Note 10 Pro7.96.9vs
Samsung Galaxy S21 5GvsSamsung Galaxy S21 Ultra 5G7.99.0vs
Samsung Galaxy S21 5GvsSamsung Galaxy S23 Ultra7.99.2
vsGoogle Pixel 6vsSamsung Galaxy S21 5G8.07.9
vsSamsung Galaxy A54vsSamsung Galaxy S21 5G7.57.9