Samsung Galaxy S20 4G vs Samsung Galaxy S25 Ultra
Our Verdict: If you've got the Galaxy S20 4G, the Galaxy S25 Ultra is five years of updates on from it. The S25 Ultra has a dramatically higher-resolution main camera, 200MP against the S20 4G's 64MP, and the S25 Ultra supports 5G while the S20 4G tops out at 4G. There's more battery in the S25 Ultra, 5000mAh to 4000mAh, which usually means longer between charges, and the S25 Ultra has the bigger screen at 6.8" against 6.2", while the S20 4G has the sharper one at 566 PPI. Coming from the S20 4G, the S25 Ultra is a genuine upgrade rather than a token one.
5 reviews 4.4
12 reviews
Samsung Galaxy S20 4G
|
Samsung Galaxy S25 Ultra
|
|
|---|---|---|
| Expert Rating | 4.4 5 reviews |
4.4 12 reviews |
| Screen | 6.2" | 6.8" |
| Display | AMOLED | Dynamic LTPO AMOLED 2X |
| Resolution | 1440 x 3200 | 1440 x 3120 |
| Pixels Per Inch | 566 | 505 |
| Rear Camera | 64 Megapixels | 200 Megapixels |
| Front Camera | 10 Megapixels | 12 Megapixels |
| Chipset | Exynos 990 | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) |
| Battery | 4,000 mAh | 5,000 mAh |
| Storage | 128GB | 256GB, 512GB, 1TB |
| OS | Android | Android 15 |
| SIM Type | Nano SIM | nano-SIM and e-SIM |
| Connectivity | Up to 4G | Up to 5G |
| Wi-Fi | 802.11 a/b/g/n/ac/ax | 802.11 a/b/g/n/ac/6e/7 |
| Bluetooth | 5.0 with A2DP, LE, apt-X | 5.3, A2DP, LE |
| Dimensions | 152 x 68 x 7.9 mm | 162.8 x 77.6 x 8.2 mm |
| Weight | 164 grams | 219 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 | - |
£33.79/mo
£29.00 upfront |
| SIM-free | - | £569.99 |
| Deals | Deals |
Cheapest Deals
Samsung Galaxy S25 Ultra
£33.79 a month, £29 upfront.
Related Comparisons
Frequently Asked Questions
Which has the better screen, the Samsung Galaxy S20 4G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra has the bigger screen at 6.8" compared to the Samsung Galaxy S20 4G's 6.2", the Samsung Galaxy S20 4G has the sharper display at 566 pixels per inch versus 505, and the Samsung Galaxy S20 4G uses a AMOLED panel while the Samsung Galaxy S25 Ultra has a Dynamic LTPO AMOLED 2X.
Which has the better camera, the Samsung Galaxy S20 4G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy S20 4G features a 64 Megapixels rear camera, while the Samsung Galaxy S25 Ultra has a 200 Megapixels rear camera. Both devices also have front-facing cameras for selfies and video calls.
What storage options are available for the Samsung Galaxy S20 4G and Samsung Galaxy S25 Ultra?
The Samsung Galaxy S20 4G is available in 128GB, while the Samsung Galaxy S25 Ultra comes in 256GB, 512GB, 1TB.
What processors do the Samsung Galaxy S20 4G and Samsung Galaxy S25 Ultra use?
The Samsung Galaxy S20 4G is powered by the Exynos 990, while the Samsung Galaxy S25 Ultra uses the Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm).
Which is easier to carry and hold, the Samsung Galaxy S20 4G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy S20 4G is the more portable of the two: it's 55g lighter at 164 grams, it's also the more compact phone at 152 x 68 x 7.9 mm.
Which is more water resistant, the Samsung Galaxy S20 4G or Samsung Galaxy S25 Ultra?
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 S20 4G and Samsung Galaxy S25 Ultra run?
The Samsung Galaxy S20 4G runs Android and the Samsung Galaxy S25 Ultra 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.