Samsung Galaxy A15 5G vs Samsung Galaxy S25 Ultra
Our Verdict: The Galaxy A15 5G and Galaxy S25 Ultra come from one brand but aim at different price points. The S25 Ultra leads on camera hardware with a 200MP main sensor to the A15 5G's 50MP, and the S25 Ultra has the stronger screen, bigger at 6.8" against 6.5" and sharper at 505 PPI. The S25 Ultra offers up to 1TB of storage versus 128GB on the A15 5G, and the A15 5G is the lighter phone at 200g against 219g. Only pay up for the S25 Ultra if you'll use what it offers; if not, the A15 5G makes more sense.
If you'd rather pay up front, the A15 5G is the cheaper buy at £95 SIM-free.
6 reviews 4.4
12 reviews
Prices updated 27 July 2026
Samsung Galaxy A15 5G
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Samsung Galaxy S25 Ultra
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|---|---|---|
| Expert Rating | 4.0 6 reviews |
4.4 12 reviews |
| Screen | 6.5" | 6.8" |
| Display | Super AMOLED | Dynamic LTPO AMOLED 2X |
| Resolution | 1080 x 2340 | 1440 x 3120 |
| Pixels Per Inch | 396 | 505 |
| Rear Camera | 50 Megapixels | 200 Megapixels |
| Front Camera | 13 Megapixels | 12 Megapixels |
| Chipset | Mediatek Dimensity 6100+ (6 nm) | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) |
| Battery | 5,000 mAh | 5,000 mAh |
| Storage | 128GB | 256GB, 512GB, 1TB |
| OS | Android 14 | 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 | 802.11 a/b/g/n/ac/6e/7 |
| Bluetooth | 5.3 with A2DP, LE | 5.3, A2DP, LE |
| Dimensions | 160.1 x 76.8 x 8.4 mm | 162.8 x 77.6 x 8.2 mm |
| Weight | 200 grams | 219 grams |
| Water Resistance | Not rated | IP68 - Dust and water resistant over 1.5 meter and 30 minutes |
| Contracts | - |
£33.79/mo
£29.00 upfront |
| SIM-free | £94.99 | £569.99 |
| Prices updated 27 July 2026 | ||
| Deals | Deals | |
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Frequently Asked Questions
Which has the better screen, the Samsung Galaxy A15 5G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra has the bigger screen at 6.8" compared to the Samsung Galaxy A15 5G's 6.5", the Samsung Galaxy S25 Ultra has the sharper display at 505 pixels per inch versus 396, and the Samsung Galaxy A15 5G uses a Super AMOLED panel while the Samsung Galaxy S25 Ultra has a Dynamic LTPO AMOLED 2X.
Which has the better camera, the Samsung Galaxy A15 5G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy A15 5G features a 50 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.
Which is cheaper to buy SIM-free, the Samsung Galaxy A15 5G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy A15 5G is cheaper SIM-free, starting from £94.99.
What storage options are available for the Samsung Galaxy A15 5G and Samsung Galaxy S25 Ultra?
The Samsung Galaxy A15 5G is available in 128GB, while the Samsung Galaxy S25 Ultra comes in 256GB, 512GB, 1TB.
What processors do the Samsung Galaxy A15 5G and Samsung Galaxy S25 Ultra use?
The Samsung Galaxy A15 5G is powered by the Mediatek Dimensity 6100+ (6 nm), 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 A15 5G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy A15 5G is the more portable of the two: it's 19g lighter at 200 grams, it's also the more compact phone at 160.1 x 76.8 x 8.4 mm.
Which is more water resistant, the Samsung Galaxy A15 5G or Samsung Galaxy S25 Ultra?
The Samsung Galaxy A15 5G is rated Not rated, while the Samsung Galaxy S25 Ultra is rated IP68 - Dust and water resistant over 1.5 meter and 30 minutes.
What operating system do the Samsung Galaxy A15 5G and Samsung Galaxy S25 Ultra run?
The Samsung Galaxy A15 5G runs Android 14 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.