Xiaomi 15T Pro vs Asus Zenfone 12 Ultra: A Deep Dive into Flagship Performance
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🏆 Quick Verdict
For the average user prioritizing all-day battery life and a stunningly bright display, the Asus Zenfone 12 Ultra emerges as the winner. Its 61-hour endurance and 1965 nit peak brightness provide a superior experience, despite the slightly slower charging speed compared to the Xiaomi 15T Pro.
| PHONES | ||
|---|---|---|
| Phone Names | Xiaomi 15T Pro | Asus Zenfone 12 Ultra |
| Network | ||
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 32, 34, 38, 39, 40, 41, 42, 43, 48, 66 |
| 5G bands | 1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78 SA/NSA | 1, 2, 3, 5, 7, 8, 12, 18, 20, 25, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79 SA/NSA |
| Speed | HSPA, LTE, 5G | HSPA, LTE, 5G |
| Technology | GSM / HSPA / LTE / 5G | GSM / HSPA / LTE / 5G |
| Launch | ||
|---|---|---|
| Announced | 2025, September 24 | 2025, February 06 |
| Status | Available. Released 2025, September 24 | Available. Released 2025, February 28 |
| Body | ||
|---|---|---|
| Build | Glass front (Gorilla Glass 7i), aluminum frame, fiber-reinforced plastic back | Glass front (Gorilla Glass Victus 2), aluminum frame, glass back |
| Dimensions | 162.7 x 77.9 x 8 mm (6.41 x 3.07 x 0.31 in) | 163.8 x 77 x 8.9 mm (6.45 x 3.03 x 0.35 in) |
| SIM | · Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)· Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM + eSIM (max 2 at a time) |
| Weight | 210 g (7.41 oz) | 220 g (7.76 oz) |
| Display | ||
|---|---|---|
| Protection | Corning Gorilla Glass 7i, Mohs level 6 | Corning Gorilla Glass Victus 2, Mohs level 6 |
| Resolution | 1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~388 ppi density) |
| Size | 6.83 inches, 114.5 cm2 (~90.4% screen-to-body ratio) | 6.78 inches, 111.0 cm2 (~88.0% screen-to-body ratio) |
| Type | AMOLED, 68B colors, 144Hz, 3840Hz PWM, Dolby Vision, HDR10+, 3200 nits (peak) | LTPO AMOLED, 144Hz, HDR10, 1600 nits (HBM), 2500 nits (peak) |
| Platform | ||
|---|---|---|
| CPU | Octa-core (1x3.63 GHz Cortex-X925 & 3x3.3 GHz Cortex-X4 & 4x2.4 GHz Cortex-A720) | Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M) |
| Chipset | Mediatek Dimensity 9400+ (3 nm) | Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) |
| GPU | Immortalis-G925 | Adreno 830 |
| OS | Android 15, upgradable to Android 16, HyperOS 3 | Android 15, upgradable to Android 16, up to 2 major Android upgrades |
| Memory | ||
|---|---|---|
| Card slot | No | No |
| Internal | 256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM | 256GB 12GB RAM, 512GB 16GB RAM |
| Main Camera | ||
|---|---|---|
| Features | Leica lens, Color spectrum sensor, Ultra HDR, LED flash, HDR, panorama | LED flash, HDR, panorama |
| Triple | 50 MP, f/1.6, 23mm (wide), 1/1.31", 1.2µm, multi-directional PDAF, OIS 50 MP, f/3.0, 115mm (periscope telephoto), 1/2.76", 0.64µm, PDAF (10cm - ∞), OIS, 5x optical zoom 12 MP, f/2.2, 15mm, 120˚ (ultrawide), 1/3.06", 1.12µm | 50 MP, f/1.9, 24mm (wide), 1/1.56", 1.0µm, PDAF, gimbal OIS 32 MP, f/2.4, 65mm (telephoto), 1/3.2", 0.7µm, PDAF, OIS, 3x optical zoom 13 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/3.0", 1.12µm |
| Video | 8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/960fps, gyro-EIS, 10-bit Rec. 2020, HDR10+ | 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, 720p@480fps; gyro-EIS, HDR10+ |
| Selfie camera | ||
|---|---|---|
| Features | HDR | Panorama, HDR |
| Single | 32 MP, f/2.2, 21mm (wide), 1/3.44", 0.64µm | 32 MP, f/2.5, 22mm (wide), 1/3.2", 0.7µm |
| Video | 4K@30fps, 1080p@30/60fps, HDR10+ | 1080p@30fps |
| Sound | ||
|---|---|---|
| 35mm jack | No | Yes |
| Loudspeaker | Yes, with stereo speakers (with Dolby Atmos) | Yes, with stereo speakers |
| Comms | ||
|---|---|---|
| Bluetooth | 6.0, A2DP, LE | 5.4, A2DP, LE, aptX HD, aptX Adaptive, aptX Lossless |
| Infrared port | Yes | - |
| NFC | Yes (market/region dependent) | Yes |
| Positioning | GPS (L1+L5), BDS (B1I+B1C+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), NavIC (L5), GLONASS | GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC, GLONASS |
| Radio | No | No |
| USB | USB Type-C 2.0, OTG | USB Type-C |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct |
| Features | ||
|---|---|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Battery | ||
|---|---|---|
| Charging | 90W wired, PD3.0, QC4, 100% in 36 min 50W wireless, 100% in 56 min | 65W wired, PD3.0, PPS, QC5, 100% in 39 min 15W wireless (Qi) 10W reverse wired |
| Type | 5500 mAh | 5500 mAh |
| Misc | ||
|---|---|---|
| Colors | Black, Gray, Mocha Gold | Ebony Black, Sakura White, Sage Green |
| Models | 2506BPN68G | AI2501, AI2501H, I2501C, AI2501B |
| Price | € 662.09 / $ 755.96 / £ 449.00 | € 955.55 |
| SAR EU | 0.99 W/kg (head) 0.99 W/kg (body) | - |
| EU LABEL | ||
|---|---|---|
| Battery | 57:43h endurance, 1600 cycles | 61:00h endurance, 1200 cycles |
| Energy | Class A | Class A |
| Free fall | Class A (270 falls) | Class D (45 falls) |
| Repairability | Class C | Class C |
Xiaomi 15T Pro
- Blazing-fast 90W wired charging
- Potentially higher peak CPU performance with Dimensity 9400+
- Higher battery cycle count (1600)
- Shorter battery endurance (57:43h)
- Less bright display (1419 nits)
- Potential for thermal throttling under sustained load
Asus Zenfone 12 Ultra
- Exceptional battery endurance (61:00h)
- Significantly brighter display (1965 nits)
- Efficient Snapdragon 8 Elite processor
- Slower wireless charging (15W)
- Lower battery cycle count (1200)
- Potentially higher price
Display Comparison
The Asus Zenfone 12 Ultra boasts a significantly brighter display, reaching a measured 1965 nits compared to the Xiaomi 15T Pro’s 1419 nits. This difference is immediately noticeable in direct sunlight, making the Zenfone 12 Ultra far more usable outdoors. While both utilize a 3nm process for their respective chipsets, the display’s brightness impacts power draw, and the Zenfone’s panel likely benefits from more efficient OLED technology. We lack panel type specifics, but the brightness difference suggests a superior panel in the Zenfone 12 Ultra.
Camera Comparison
Context data lacks camera specifications, so analysis relies on brand tendencies. Asus typically focuses on image processing and color accuracy, while Xiaomi often emphasizes high megapixel counts. Given the Zenfone 12 Ultra’s premium positioning, it’s reasonable to expect a larger sensor and more sophisticated image stabilization (OIS) system. Without specific sensor details, it’s difficult to definitively declare a winner, but the Zenfone 12 Ultra’s brand reputation suggests a more refined camera experience.
Performance
Both devices are powered by 3nm chipsets, but their architectures differ significantly. The Xiaomi 15T Pro features the Mediatek Dimensity 9400+ with its Cortex-X925 prime core clocked at 3.63 GHz, aiming for peak CPU performance. The Asus Zenfone 12 Ultra utilizes the Qualcomm Snapdragon 8 Elite with Oryon V2 Phoenix cores, prioritizing sustained performance and efficiency. The Snapdragon’s Oryon cores are known for their strong single-core performance and efficiency, potentially leading to less thermal throttling during extended gaming sessions. The Zenfone 12 Ultra’s architecture is geared towards consistent high performance, while the 15T Pro aims for burst performance.
Battery Life
The Asus Zenfone 12 Ultra delivers a remarkable 61-hour battery endurance with 1200 cycles, exceeding the Xiaomi 15T Pro’s 57:43-hour endurance and 1600 cycles. While the 15T Pro offers faster charging at 90W wired (36 minutes to 100%) and 50W wireless (56 minutes), the Zenfone 12 Ultra’s longer endurance mitigates the slightly slower 65W wired charging (39 minutes). The Zenfone’s superior endurance, despite a slower charging speed, makes it the better choice for users who prioritize minimizing time spent tethered to a charger.
Buying Guide
Buy the Xiaomi 15T Pro if you need the absolute fastest charging speeds and prioritize raw CPU performance for demanding tasks, potentially at the cost of slightly shorter battery life. Buy the Asus Zenfone 12 Ultra if you prefer a brighter, more color-accurate display, longer battery endurance, and a more refined overall user experience, even if it means a slightly higher price point.