OPPO A 6 Pro vs Samsung Galaxy S25 Ultra
Our Verdict: The Samsung Galaxy S25 Ultra leads on camera hardware with a 200MP main sensor to the OPPO A 6 Pro's 50MP, and there's more battery in the A5 2020 6 Pro, 7000mAh to 5000mAh, which should mean longer between charges in day-to-day use. The S25 Ultra has the stronger screen, bigger at 6.8" against 6.6" and sharper at 505 PPI, and storage goes higher on the S25 Ultra, up to 1TB against 256GB. The S25 Ultra is the one to have if you want what it adds, but the A5 2020 6 Pro is the smarter buy if you'd rather keep the money.
Over a full contract, the A5 2020 6 Pro works out around £361 all-in, about £479 less than the S25 Ultra.
Prices updated 27 July 2026
OPPO A 6 Pro
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Samsung Galaxy S25 Ultra
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|---|---|---|
| Screen | 6.57" | 6.8" |
| Display | AMOLED | Dynamic LTPO AMOLED 2X |
| Resolution | 1080 x 2372 | 1440 x 3120 |
| Pixels Per Inch | 397 | 505 |
| Rear Camera | 50 Megapixels | 200 Megapixels |
| Front Camera | 16 Megapixels | 12 Megapixels |
| Chipset | Mediatek Dimensity 6300 (6 nm) | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) |
| Battery | 7,000 mAh | 5,000 mAh |
| Storage | 128GB, 256GB | 256GB, 512GB, 1TB |
| OS | Android | Android 15 |
| SIM Type | Nano SIM + 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 | 5.4, A2DP, LE, aptX HD | 5.3, A2DP, LE |
| Dimensions | 158.2 x 75 x 8 mm | 162.8 x 77.6 x 8.2 mm |
| Weight | 185 grams | 219 grams |
| Water Resistance | IP68/IP69 dust/water resistant (up to 1.5m for 30 min) | IP68 - Dust and water resistant over 1.5 meter and 30 minutes |
| Contracts |
£9.99/mo
£99.00 upfront |
£33.79/mo
£29.00 upfront |
| SIM-free | £247.00 | £569.99 |
| Prices updated 27 July 2026 | ||
| Deals | Deals | |
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Frequently Asked Questions
Is the OPPO A 6 Pro or Samsung Galaxy S25 Ultra cheaper on contract?
Based on total cost of ownership, the OPPO A 6 Pro is cheaper on contract at £361.16 over the life of the deal from £9.99 per month with £99.00 upfront.
Which has the better screen, the OPPO A 6 Pro or Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra has the bigger screen at 6.8" compared to the OPPO A 6 Pro's 6.6", the Samsung Galaxy S25 Ultra has the sharper display at 505 pixels per inch versus 397, and the OPPO A 6 Pro uses a AMOLED panel while the Samsung Galaxy S25 Ultra has a Dynamic LTPO AMOLED 2X.
Which has the better camera, the OPPO A 6 Pro or Samsung Galaxy S25 Ultra?
The OPPO A 6 Pro 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 OPPO A 6 Pro or Samsung Galaxy S25 Ultra?
The OPPO A 6 Pro is cheaper SIM-free, starting from £247.00.
What storage options are available for the OPPO A 6 Pro and Samsung Galaxy S25 Ultra?
The OPPO A 6 Pro is available in 128GB, 256GB, while the Samsung Galaxy S25 Ultra comes in 256GB, 512GB, 1TB.
What processors do the OPPO A 6 Pro and Samsung Galaxy S25 Ultra use?
The OPPO A 6 Pro is powered by the Mediatek Dimensity 6300 (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 OPPO A 6 Pro or Samsung Galaxy S25 Ultra?
The OPPO A 6 Pro is the more portable of the two: it's 34g lighter at 185 grams, it's also the more compact phone at 158.2 x 75 x 8 mm.
Which is more water resistant, the OPPO A 6 Pro or Samsung Galaxy S25 Ultra?
The OPPO A 6 Pro is rated IP68/IP69 dust/water resistant (up to 1.5m for 30 min), 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 OPPO A 6 Pro and Samsung Galaxy S25 Ultra run?
The OPPO A 6 Pro 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.