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Xiaomi 12T Smartphone User Guide

Quick start guide for the Xiaomi 12T smartphone, covering device setup, SIM card installation, safety precautions, and regulatory information.

Table of contents

Quick guide from the manual

This document provides essential instructions for setting up and safely using your Xiaomi 12T smartphone. To turn on the device, press and hold the power button. Follow the on-screen instructions to complete the initial configuration.

Device Overview

The device features volume buttons and a power button on the side, with a USB Type-C port located at the bottom. The device supports dual Nano-SIM cards.

Xiaomi 12T button and port layout
Xiaomi 12T button and port layout

SIM Card Setup

  • The device supports dual SIM cards with no carrier restrictions.
  • Both slots support Nano-SIM cards.
  • Dual SIM 5G/4G/3G/2G and VoLTE are supported.
  • Do not insert non-standard SIM cards, as this may damage the SIM card slot.

Safety Information

  • Operating Temperature: Use the device within the 0°C to 40°C range.
  • Battery Safety: Do not attempt to replace the built-in battery yourself. Use only authorized cables and power adapters. Do not charge for more than 12 hours.
  • Handling: Do not disassemble, hit, crush, or burn the battery or the device. If the battery appears deformed or damaged, stop using it immediately.
  • Environment: Keep the device dry. Do not use it in high-humidity areas like bathrooms.
  • Medical Interference: Maintain a minimum distance of 15 cm between the phone and pacemakers. Consult a doctor if you use medical devices.

Maintenance and Support

Do not attempt to repair the device yourself. If it malfunctions, contact Mi customer support or visit an authorized repair center. Always keep your operating system updated using the built-in software update feature.

Regulatory Information

The device complies with EU and UK regulations regarding radio equipment and SAR (Specific Absorption Rate) limits. For body-worn operation, maintain a separation distance of at least 5 mm from the body. Use accessories that do not contain metal components for body-worn use.

Manufacturer information

Xiaomi Corporation

Brand profile

Practical help

Common problems

Device does not work properly

Do not attempt to repair it yourself. Contact Mi customer support or visit an authorized repair center.

Battery appears deformed or damaged

Stop using the device immediately and seek professional assistance.

Potential interference with medical devices

Maintain a minimum distance of 15 cm from pacemakers and consult your doctor.

Before use

  • Ensure the power adapter meets IEC/EN 62368-1 standards.
  • Use only authorized cables and accessories.
  • Insert standard Nano-SIM cards only.
  • Update the operating system via the built-in feature.
  • Keep the device dry and within 0°C-40°C temperature range.

Specs in practice

Operating Temperature
0°C to 40°C; usage outside this range may damage the device.
SAR Limit (EU/UK)
2.0 W/kg (10g) for head and trunk.
Charging Limit
Do not charge the device for more than 12 hours.

Images and diagrams

  • The device features volume and power buttons on the right side.
  • The USB Type-C port is located at the bottom center.
  • SIM card installation involves inserting a Nano-SIM into the designated slot.

Model compatibility

  • Supports Dual SIM 5G/4G/3G/2G.
  • 5G connection depends on country, carrier, and environment.
  • VoLTE depends on carrier network deployment.

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.