1. Introduction
The Xiaomi 15T Ai 5G is a high-performance smartphone designed for advanced mobile communication and multimedia experiences. It features an ultra-slim design, a 6.83-inch 120Hz eye-care display, and is powered by the MediaTek Dimensity 8400-Ultra processor. The device includes a professional Leica triple camera system and supports 67W HyperCharge for its 5500mAh battery. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your Xiaomi 15T Ai 5G smartphone.
Image 1.1: Front and rear view of the Xiaomi 15T Ai 5G smartphone, showcasing its sleek design and camera module.
2. What's in the Box
Upon unboxing your Xiaomi 15T Ai 5G, please verify that the following items are included:
- Xiaomi 15T Ai 5G Smartphone
- USB Cable (Type-C)
- SIM Tray Ejector
- Phone Case
- User Manual (this document)
Note: A power adapter is not included in the box. A Xiaomi 67W power adapter or above is recommended for optimal charging performance.
3. Setup
3.1 SIM Card Installation
- Locate the SIM card tray on the side of your device.
- Insert the SIM tray ejector tool into the small hole next to the tray and press firmly until the tray pops out.
- Place your Nano-SIM card(s) into the designated slots on the tray. The Xiaomi 15T supports Dual Nano SIM and eSIM functionality. Micro SD cards are not supported.
- Carefully reinsert the SIM tray into the device.
3.2 Powering On/Off
- To Power On: Press and hold the Power button (located on the side) until the Xiaomi logo appears on the screen.
- To Power Off: Press and hold the Power button, then select 'Power off' from the options that appear on the screen.
- To Restart: Press and hold the Power button, then select 'Restart' from the options.
3.3 Initial Configuration
Upon first power-on, the device will guide you through the initial setup process. This includes selecting your language, connecting to a Wi-Fi network, setting up your Google account, and configuring security features like fingerprint unlock and AI face unlock.
4. Operating the Device
4.1 Display Features
The Xiaomi 15T features a 6.83-inch AMOLED flat display with ultra-slim bezels, offering a resolution of 2772 x 1280 pixels (447ppi). Key display characteristics include:
- Refresh Rate: Up to 120Hz for smooth visuals.
- Touch Sampling Rate: 480Hz, with an instantaneous touch sampling rate of 2560Hz (activated in Game Turbo mode).
- Brightness: Peak brightness of 3200 nits, ensuring clear readability in various lighting conditions.
- Color Depth: 68 billion colors with DCI-P3 color gamut, Original color PRO, Pro HDR, HDR10+, and Dolby Vision support.
- Eye Care: TÜV Rheinland Low Blue Light (Hardware Solution) Certified, Flicker Free Certified, and Circadian Friendly Certified.
- Protection: Corning Gorilla Glass 7i.
Image 4.1: Visual representation of the Xiaomi 15T's advanced display specifications.
4.2 Camera System
The Xiaomi 15T is equipped with a versatile Leica triple camera system and a high-resolution front camera.
Rear Camera (Leica Triple Camera)
- Main Camera: 50MP, Leica 23mm equivalent focal length, f/1.7 aperture, OIS, Light Fusion 800 image sensor (2.0µm 4-in-1 Super Pixel).
- Telephoto Camera: 50MP, Leica 46mm equivalent focal length, f/1.9 aperture.
- Ultra-Wide Camera: 12MP, Leica 15mm equivalent focal length, f/2.2 aperture, 120° field of view.
The Leica Summilux optical lens ensures exceptional optical performance and accurate color reproduction. The camera system supports 4K video recording at 30/60 fps, 1080p HD video recording at 30/60 fps, and slow-motion video up to 960fps.
Image 4.2: Close-up of the Leica triple camera setup, highlighting its professional capabilities.
Front Camera
- Resolution: 32MP in-display selfie camera.
- Focal Length: 21mm equivalent, f/2.2 aperture.
Front camera features include HDR, Portrait mode, Palm shutter, Voice shutter, Timed burst, Selfie timer, Screen fill light, and HDR10+ video recording. It supports 4K video recording at 30 fps.
Image 4.3: Advanced video recording capabilities of the Xiaomi 15T, including 10-bit log and LUT import.
4.3 Connectivity
The Xiaomi 15T offers robust connectivity options:
- Network: Supports 2G, 3G, 4G LTE (FDD and TDD), and 5G (NSA + SA) networks. Compatible with T-Mobile, Mint, and Tello in the USA, and global networks.
- GPS: L1+L5 GPS, Galileo (E1+E5a), GLONASS (G1), Beidou, QZSS (L1+L5), NavIC (L5), and A-GPS supplementary positioning.
- Wireless: Wi-Fi, Bluetooth.
- Xiaomi Astral Communication: Enhanced connectivity with the self-developed Xiaomi Surge T1S Tuner, optimizing Wi-Fi, Bluetooth, GPS, and cellular signals.
Image 4.4: Xiaomi Astral Communication system with Surge T1S Tuner for improved signal performance.
4.4 AI Features (Google Gemini & Xiaomi HyperAI)
The Xiaomi 15T integrates advanced AI capabilities through Google Gemini and Xiaomi's HyperAI ecosystem:
- Circle to Search with Google: Quickly search for information by circling objects on your screen.
- Google Gemini: A personal AI assistant for various tasks, including Gemini Live (ask about what you see), Gemini overlay (quick access without switching apps), Image generation, and Connected apps (pull information and take action across apps).
- Xiaomi AI Features: AI Interpreter, AI Notes, AI Recorder, AI Subtitles, AI Film, AI image editing, AI Portrait.
Image 4.5: Google Gemini integration on the Xiaomi 15T, showcasing its interactive AI capabilities.
4.5 Battery and Charging
The device is powered by a 5500mAh (typical) Xiaomi Surge battery, offering extended usage times. It supports 67W HyperCharge technology for rapid charging via its USB-C port.
- Battery Capacity: 5500mAh (typical).
- Charging: 67W HyperCharge, supports PD3.0 / PD2.0.
- Charging Port: USB Type-C.
Note: A power adapter is not included. Using a Xiaomi 67W power adapter or above is recommended for optimal charging speed.
Image 4.6: Battery and charging features, emphasizing the 5500mAh capacity and 67W HyperCharge.
5. Maintenance
5.1 Software Updates
Regularly check for and install software updates to ensure your device has the latest features, security patches, and performance improvements. Updates are typically delivered over-the-air (OTA) and can be accessed through the device's settings menu.
5.2 Cleaning Your Device
To clean your Xiaomi 15T, use a soft, lint-free cloth. Avoid using harsh chemicals, abrasive materials, or aerosol sprays, as these can damage the screen and finish. For stubborn smudges, slightly dampen the cloth with water.
5.3 Battery Care
To prolong battery life:
- Avoid exposing the device to extreme temperatures.
- Do not fully discharge the battery frequently.
- Use the recommended 67W charger for optimal charging.
6. Troubleshooting
This section addresses common issues you might encounter with your Xiaomi 15T Ai 5G.
6.1 Device Not Turning On
- Ensure the battery is charged. Connect the device to a charger for at least 15 minutes before attempting to power it on.
- Press and hold the Power button for 10-15 seconds to perform a forced restart.
6.2 Poor Network Connectivity
- Check if your SIM card is properly inserted.
- Verify that you are within network coverage.
- Restart the device.
- Go to Settings > Network & internet > Mobile network and ensure your preferred network type is selected.
6.3 Screen Unresponsive
- Perform a forced restart by holding the Power button.
- Ensure the screen is clean and free of moisture.
6.4 Battery Draining Quickly
- Reduce screen brightness.
- Close unused applications running in the background.
- Disable features like Wi-Fi, Bluetooth, or GPS when not in use.
- Check battery usage in Settings to identify power-hungry apps.
7. Specifications
Detailed technical specifications for the Xiaomi 15T Ai 5G (Model: 15T):
| Feature | Specification |
|---|---|
| Model Number | 15T |
| Operating System | Android |
| Processor | MediaTek Dimensity 8400-Ultra (4nm process, CPU: 1x Arm Cortex-A725 up to 3.25GHz, 3x Arm Cortex-A725 up to 3.0GHz, 4x Arm Cortex-A725 up to 2.1GHz; GPU: Mali-G720; AI: NPU 880) |
| RAM | 12 GB |
| Storage Capacity | 512 GB |
| Display Size | 6.83 Inches |
| Display Resolution | 2772 x 1280 pixels (447ppi) |
| Refresh Rate | Up to 120Hz |
| Peak Brightness | 3200 nits |
| Rear Camera | Leica Triple Camera: 50MP Main, 50MP Telephoto, 12MP Ultra-Wide |
| Front Camera | 32MP |
| Battery Capacity | 5500 mAh (typical) |
| Charging | 67W HyperCharge (USB-C) |
| Connectivity | 2G, 3G, 4G, 5G, Wi-Fi, Bluetooth, GPS (L1+L5), Galileo, GLONASS, Beidou, QZSS, NavIC |
| Dimensions | 0.3 x 3.07 x 6.43 inches |
| Weight | 14.1 ounces (0.4 Kilograms) |
| Color | Rose Gold |
| Wireless Carrier | Unlocked for All Carriers (USA: T-Mobile, Mint, Tello compatible) |
Image 7.1: Key features and specifications of the Xiaomi 15T Ai 5G.
Image 7.2: The MediaTek Dimensity 8400-Ultra processor, the core of the Xiaomi 15T's performance.
8. Warranty and Support
Please note that this is an International Model and may not carry a warranty in the US. For specific warranty information, please refer to the documentation provided at the point of purchase or contact your seller directly.
For technical support or further assistance, please visit the official Xiaomi support website or contact their customer service.
