Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 Enterprise Edition
Our Verdict: There's four years between the Galaxy S21 Ultra and the Galaxy S25 Enterprise Edition, so the Galaxy S25 Enterprise Edition is ahead on most things. The S21 Ultra 5G leads on camera hardware with a 108MP main sensor to the S25 Enterprise Edition's 50MP, plus a 40MP selfie camera against 12MP, and there's more battery in the S21 Ultra 5G, 5000mAh to 4000mAh, which should mean longer between charges in day-to-day use. The S21 Ultra 5G has the stronger screen, bigger at 6.8" against 6.2" and sharper at 516 PPI, and storage goes higher on the S21 Ultra 5G, up to 512GB against 128GB. The S25 Enterprise Edition is the better phone; upgrade from the S21 Ultra 5G if you want the newer hardware, or hold on if yours still does the job.
If you'd rather pay up front, the S21 Ultra 5G is the cheaper buy at £235 SIM-free.
Prices updated 26 July 2026
Samsung Galaxy S21 Ultra
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Samsung Galaxy S25 Enterprise Edition
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|---|---|---|
| Screen | 6.8" | 6.2" |
| Display | Dynamic AMOLED 2X capacitive touchscreen | Dynamic LTPO AMOLED 2X |
| Resolution | 1440 x 3200 | 1080 x 2340 |
| Pixels Per Inch | 516 | 416 |
| Rear Camera | 108 Megapixels | 50 Megapixels |
| Front Camera | 40 Megapixels | 12 Megapixels |
| Chipset | Exynos 2100 | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) |
| Battery | 5,000 mAh | 4,000 mAh |
| Storage | 128GB, 256GB, 512GB | 128GB |
| OS | Android 11 | Android 15 |
| SIM Type | Nano SIM | nano-SIM and e-SIM |
| Connectivity | Up to 5G | Up to 5G |
| Wi-Fi | 802.11 a/b/g/n/ac/6 | 802.11 a/b/g/n/ac/6e/7 |
| Bluetooth | 5.1 with A2DP, LE | 5.4, A2DP, LE |
| Dimensions | 165.1 x 75.6 x 8.9 mm | 146.9 x 70.4 x 7.2 mm |
| Weight | 228 grams | 162 grams |
| Water Resistance | IP68 - Dust and water resistant over 1.5 meter and 30 minutes | IP68 - Dust and water resistant over 1.5 meter and 30 minutes |
| Contracts | - | - |
| SIM-free | £234.99 | £549.00 |
| Prices updated 26 July 2026 | ||
| Deals | Deals | |
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Frequently Asked Questions
Which has the better screen, the Samsung Galaxy S21 Ultra or Samsung Galaxy S25 Enterprise Edition?
The Samsung Galaxy S21 Ultra has the bigger screen at 6.8" compared to the Samsung Galaxy S25 Enterprise Edition's 6.2", the Samsung Galaxy S21 Ultra has the sharper display at 516 pixels per inch versus 416, and the Samsung Galaxy S21 Ultra uses a Dynamic AMOLED 2X capacitive touchscreen panel while the Samsung Galaxy S25 Enterprise Edition has a Dynamic LTPO AMOLED 2X.
Which has the better camera, the Samsung Galaxy S21 Ultra or Samsung Galaxy S25 Enterprise Edition?
The Samsung Galaxy S21 Ultra features a 108 Megapixels rear camera, while the Samsung Galaxy S25 Enterprise Edition has a 50 Megapixels rear camera. Both devices also have front-facing cameras for selfies and video calls.
Which is cheaper to buy SIM-free, the Samsung Galaxy S21 Ultra or Samsung Galaxy S25 Enterprise Edition?
The Samsung Galaxy S21 Ultra is cheaper SIM-free, starting from £234.99.
What storage options are available for the Samsung Galaxy S21 Ultra and Samsung Galaxy S25 Enterprise Edition?
The Samsung Galaxy S21 Ultra is available in 128GB, 256GB, 512GB, while the Samsung Galaxy S25 Enterprise Edition comes in 128GB.
What processors do the Samsung Galaxy S21 Ultra and Samsung Galaxy S25 Enterprise Edition use?
The Samsung Galaxy S21 Ultra is powered by the Exynos 2100, while the Samsung Galaxy S25 Enterprise Edition uses the Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm).
Which is easier to carry and hold, the Samsung Galaxy S21 Ultra or Samsung Galaxy S25 Enterprise Edition?
The Samsung Galaxy S25 Enterprise Edition is the more portable of the two: it's 66g lighter at 162 grams, it's also the more compact phone at 146.9 x 70.4 x 7.2 mm, and is slimmer at 7.2mm thick.
Which is more water resistant, the Samsung Galaxy S21 Ultra or Samsung Galaxy S25 Enterprise Edition?
Both phones share the same water resistance rating of IP68 - Dust and water resistant over 1.5 meter and 30 minutes.
What operating system do the Samsung Galaxy S21 Ultra and Samsung Galaxy S25 Enterprise Edition run?
The Samsung Galaxy S21 Ultra runs Android 11 and the Samsung Galaxy S25 Enterprise Edition runs Android 15. This is one of the biggest factors when choosing between the two, as each ecosystem has its own apps, services and features.