OPPO A3x 4G vs Xiaomi 15 Ultra
28.9Performance79.1
37.6Display69.1
20Camera73.2
53.4Battery79
20Features78.7
3 spec wins — OPPO A3x 4G12 spec wins — Xiaomi 15 Ultra
InnoReviews verdict
Xiaomi 15 Ultra wins this phone face-off, 75.9 to 32.9, pulling ahead mainly in features (+59) and camera (+53). OPPO A3x 4G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the OPPO A3x 4G
- 18% lower weight: 186 g vs 226 g
- 18% lower thickness: 7.7 mm vs 9.4 mm
- Has 3.5mm jack — the other doesn't
Reasons to pick the Xiaomi 15 Ultra
- Stronger performance score: 79 vs 29
- Stronger display score: 69 vs 38
- Stronger camera score: 73 vs 20
- Stronger battery score: 79 vs 53
- Stronger features score: 79 vs 20
Display
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Screen size | 6.67 ″ | 6.73 ″+1% |
| Panel type | LCD | LTPO AMOLED |
| Resolution | 1604x720 | 1440x3200 |
| Pixel density | 264 ppi | 522 ppi+98% |
| Refresh rate | 90 Hz | 120 Hz+33% |
| Peak brightness | 1,000 nits | 3,200 nits+220% |
| Screen-to-body | 89.9 % | 90 % |
Performance
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Chipset | Snapdragon 6s 4G Gen 1 | Snapdragon 8 Elite |
| AnTuTu | — | 2,650,000 |
| Geekbench 6 (single) | — | 3,050Top 12% |
| Geekbench 6 (multi) | — | 9,600Top 11% |
| RAM (max) | 8 GB | 16 GB+100% |
| Storage options | 64GB / 128GB / 256GB | 256/512GB/1TB |
| Storage type | eMMC 5.1 | UFS 4.1 |
Camera
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Main camera | 8 MP | 50 MP+525% |
| Main aperture | f/2.0 | f/1.63 |
| Ultra-wide | — | 50 MP |
| Telephoto | — | 200 MP |
| Optical zoom | — | 4.3 x |
| Max video | 1080p@30fps | 8K@30fps |
| Front camera | 5 MP | 32 MP+540% |
| OIS | — | Yes |
Battery
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Capacity | 5,100 mAh | 5,410 mAh+6% |
| Wired charging | 45 W | 90 W+100% |
| Wireless charging | — | 80 W |
| Active use endurance | — | 12 h |
Design
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Weight | 186 g+18% | 226 g |
| Thickness | 7.7 mm+18% | 9.4 mm |
| IP rating | IP54 | IP68 |
| Frame material | — | Aluminum |
Connectivity
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| 5G | No | Yes |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 7 |
| Bluetooth | 5.0 | 6.0 |
| NFC | No | Yes |
| USB | USB-C | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| OS at launch | Android 14 (ColorOS 14) | Android 15 (HyperOS 2) |
| OS update pledge | — | 4 years |
Audio
| Spec | OPPO A3x 4G | Xiaomi 15 Ultra |
|---|---|---|
| Stereo speakers | — | Yes |
| 3.5mm jack | Yes | No |