Xiaomi skipped a number between the 15T and 17T, but not the progress. There are more changes here than usual between neighbouring T-series generations. And the most important one is in the camera.
Short answer
Xiaomi 17T - a 5× telephoto instead of 2×, +1000 mAh of battery, a more compact body, Wi-Fi 7 and HyperOS 3. Xiaomi 15T - if you find it much cheaper: still a strong phone with 12 GB of RAM and the Dimensity 8400.
Key differences
| Spec | Xiaomi 17T | Xiaomi 15T |
|---|---|---|
| Chip | Dimensity 8500 Ultra | Dimensity 8400 Ultra |
| Display | 6.59", 1268×2756, up to 3500 nits | 6.83", 1280×2772, up to 3200 nits |
| Telephoto | 50 MP, 5× | 50 MP, 2× |
| Battery | 6500 mAh | 5500 mAh |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 6E |
| Dimensions / weight | 157.6 × 75.2 × 8.17 mm, 200 g | 163.2 × 78 × 7.5 mm, 194 g |
| OS | HyperOS 3, Android 16 | HyperOS 2, Android 15 |
| Price | current prices | current prices |
The same: 50 MP Light Fusion 800 main camera, 12 MP ultra-wide, 32 MP front camera, 67 W, 12 GB of RAM, IP68, IR blaster.
Camera
A 5× telephoto instead of 2× is a real upgrade. The 15T's 2× is more of a "portrait" module, while the 17T's 5× gives proper zoom for concerts, architecture and details.
Battery
+1000 mAh in a smaller body is a noticeable improvement.
Size
The 17T is more compact: 6.59" vs 6.83". It is, however, thicker and 6 g heavier.
Performance
The Dimensity 8500 got an eighth GPU core and faster memory compared with the Dimensity 8400. The gain is noticeable in games but not in everyday tasks.
Verdict: who should buy which
- Zoom and battery - Xiaomi 17T.
- Big screen - Xiaomi 15T.
- Savings - a discounted Xiaomi 15T.
FAQ
What's the telephoto difference?
5× on the 17T vs 2× on the 15T.
What battery does the 17T have?
6500 mAh.
Is the 17T more compact?
Yes, 6.59" vs 6.83".