Mobile / Smartphones
Xiaomi 12T User Guide
Quick start guide for the Xiaomi 12T smartphone, covering device setup, dual SIM configuration, safety precautions, and important usage information.
Table of contents
Quick guide from the manual
This document provides essential information for setting up and safely using your Xiaomi 12T smartphone. It covers initial configuration, dual SIM management, and critical safety precautions to ensure optimal performance and user safety.
Device setup
To turn on your device, press and hold the power button. Follow the on-screen instructions to complete the initial configuration of your phone.
Dual SIM configuration
The Xiaomi 12T supports dual SIM functionality with the following features:
- Supports dual SIM cards with no carrier restrictions and dual 5G connectivity.
- Features dual Nano-SIM card slots; either card can be set as the primary card.
- Supports dual SIM 5G/4G/3G/2G and VoLTE.
Note: 5G connection and VoLTE availability depend on your country, carrier, and user environment. Do not insert non-standard SIM cards into the slot, as this may cause damage.
Safety information
To ensure safe operation, please adhere to the following guidelines:
- Operating Temperature: Use the device within the range of 0°C to 40°C.
- Battery Safety: Do not attempt to replace the built-in battery yourself. Use only authorized cables and power adapters. Do not charge the device for more than 12 hours.
- Handling: Do not disassemble, hit, crush, or burn the battery. If the battery appears deformed or damaged, stop using it immediately.
- Unauthorized Accessories: Use of unauthorized cables, adapters, or batteries can cause fire, explosion, or electric shock.
- Hearing Protection: To prevent potential hearing damage, avoid listening at high volume levels for long periods.
Maintenance and disposal
Keep your device dry. Do not attempt to repair the device yourself; contact Xiaomi customer support or an authorized repair center for any issues. Dispose of the device, battery, and accessories according to local regulations. This product must not be discarded with household waste in the EU.
Legal and compliance
This device is intended for use in all EU member states. Indoor use is restricted to the 5250 to 5350 MHz frequency range in specific countries. Ensure your power adapter meets the requirements of Clause 6.4.5 in IEC/EN 62368-1.
Manufacturer information
Xiaomi Corporation
Practical help
Common problems
Device not working properly
Do not attempt to repair it yourself. Contact Mi customer support or bring the device to an authorized repair center.
Battery appears deformed or damaged
Stop using the device immediately and contact an authorized repair center.
SIM card not fitting or damaging slot
Do not insert non-standard SIM cards into the SIM card slot.
Before use
- Ensure the device is charged using the included or authorized cable and adapter.
- Check that your SIM cards are standard Nano-SIM cards.
- Verify that the operating environment is between 0°C and 40°C.
- Read all safety information provided in the manual.
Specs in practice
- Operating Temperature
- 0°C to 40°C; using the device outside this range may cause damage.
- Charging Limit
- Do not charge the device for more than 12 hours.
Images and diagrams
- The device features a power button and volume buttons on the side.
- The SIM card slot is located at the bottom of the device.
Model compatibility
- Indoor use restricted to 5250-5350 MHz in EU countries.
- Power adapter must meet Clause 6.4.5 of IEC/EN 62368-1.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.