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Information about the copyright of the manual and registered trademarks.
Explanation of icons used in the manual to convey warnings, cautions, and notes.
Lists the items included in the M3 UL20 device package.
Instructions on battery handling, insertion, removal, and charging.
Guide on powering the device on, off, and managing standby mode.
Instructions for inserting and accessing data on Micro-SD cards.
Procedures for inserting the SIM card for mobile network connectivity.
Identifies physical components and explains button functions.
Describes the home screen structure, status/notification bars, and navigation elements.
Explains icons and notifications in the status and notification bars.
Details the application shortcut icons available on the home screen.
Explains the dock bar and virtual keyboard for data input.
Instructions for performing soft and factory resets to troubleshoot issues.
Explanation of the FRP feature and its implications during factory resets.
Details on how Factory Reset Protection works and how to manage it.
Step-by-step instructions for establishing a USB connection between the device and a PC.
Explains USB connection modes and troubleshooting tips.
Essential operations for making calls, viewing call history, and managing contacts.
Guide on how to turn on and connect to Wi-Fi networks.
Detailed process for connecting to an Access Point (AP) via Wi-Fi.
Guide on enabling Bluetooth and pairing with other devices.
Details the process of pairing the device with available Bluetooth devices, including PIN entry.
How to activate, set up, and transfer data using NFC.
Details methods for NFC data transfer with devices and tags.
Using NFC to facilitate connection with Bluetooth devices.
Instructions on how to operate the device's built-in scanner.
Explains how to properly aim the scanner at barcodes and safety precautions.
Guide on how to check for and perform OS updates on the M3 UL20.
How to customize and change the device's key assignments for user convenience.
Procedure for swapping the device battery without rebooting.
Details on the fast charging capability and precautions.
How to adjust touch sensitivity for normal use or while wearing gloves.
Explanation of the 'Heat the Wire' application for low-temperature environments.
Details on operating the Scan Window Heater and LCD Back Heater.
Provides head office, service center, and email contact details for M3 Mobile.
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General