4G LTE Smart Watch User Manual

1. Introduction

Thank you for choosing the 4G LTE Smart Watch, model DM20 LEMFO LEM10. This advanced smartwatch combines the functionality of a smartphone with the convenience of a wearable device. Featuring an Android 9 operating system, a high-definition camera, GPS, and WiFi connectivity, it is designed to keep you connected and track your fitness activities. Please note that this is an upgraded version, distinct from the D20C or DM20C models.

2. Package Contents

• Smart Watch (x1)
• Data Cable (x1)
• User Manual (x1)
• Packing Box (x1)

3. Product Overview

The DM20 LEMFO LEM10 Smart Watch features a sleek design with a 2.08-inch HD display and a durable CNC aluminum magnesium alloy casing. It integrates a front-facing camera and various sensors for comprehensive functionality.

Front view of the Smart Watch with its vibrant display.

Side view showcasing the premium build quality.

4. Setup

4.1 SIM Card Installation

The smartwatch supports an independent Nano SIM card for full 4G network connectivity, allowing you to make and receive calls directly from your wrist.

1. Locate the SIM card slot on the side of the watch.
2. Carefully insert a Nano SIM card into the slot as shown in the diagram.
3. Ensure the SIM card is securely seated.

SIM card insertion and call functions.

4.2 Initial Charging

Before first use, fully charge your smartwatch. The device is equipped with a 930mAh polymer lithium battery.

1. Connect the magnetic charging cable to the charging port on the back of the watch.
2. Connect the other end of the cable to a USB power adapter (not included) or a computer USB port.
3. The watch display will indicate charging status. A full charge typically takes a few hours.

Charging the smartwatch.

4.3 Power On/Off

• To Power On: Press and hold the side power button until the screen lights up.
• To Power Off: Press and hold the side power button, then select 'Power Off' on the screen.

4.4 Bluetooth Pairing

The watch supports Bluetooth 5.0 for connecting to other devices like headphones.

1. On your smartwatch, navigate to Settings > Connected devices > Bluetooth.
2. Ensure Bluetooth is turned on.
3. The watch will search for available devices. Select your device from the list to pair.

5. Operating Instructions

5.1 Screen Navigation

The smartwatch features a capacitive touch screen for intuitive interaction.

• Swipe Up/Down/Left/Right: Navigate through menus, notifications, and quick settings.
• Tap: Select an item or open an application.
• Press and Hold: Access additional options or customize watch faces.

5.2 Making and Receiving Calls

With an installed SIM card, you can make and receive calls directly from your watch.

• Dialing: Open the Phone app, enter the number, and tap the call icon.
• Answering: When a call comes in, tap the green answer icon.
• Refusing: Tap the red refuse icon to decline a call.

5.3 Messaging and Social Apps

The watch supports instant messaging and various social applications.

Instant messaging capabilities.

5.4 App Installation (Google Play)

The smartwatch runs on Android 9.0 and supports downloading third-party software from the Google Play Store.

1. Ensure the watch is connected to WiFi or has an active 4G data connection.
2. Open the Google Play Store app on your watch.
3. Search for and install desired applications.

Support for massive app downloads via Google Play.

5.5 Camera Usage

The watch features a 5-megapixel HD camera for photography and video functions.

• Open the Camera app from the main menu.
• Tap to take photos or switch to video recording mode.
• Supports video chat and playback.

High definition camera features.

5.6 GPS Navigation

Utilize the built-in GPS for real-time trajectory tracking and navigation.

• Open a map application (e.g., Google Maps) on your watch.
• The watch supports GPS, Beidou, and Granas satellite signals for accurate positioning.

Real-time trajectory tracking with built-in GPS.

5.7 Music Playback

Connect to Bluetooth devices to enjoy quality music directly from your watch.

• Pair your Bluetooth headphones with the watch (see section 4.4).
• Open the Music app and select your desired audio.
• Supports various audio formats including mp3, acc, amr, ogg, m4a, mid, wma, flac, ape, aac, wav.

Listen to music via Bluetooth connection.

5.8 SOS Function

In case of emergency, the SOS function allows for quick contact with pre-set numbers.

• Configure emergency contacts in the watch settings.
• Press the designated SOS button (or activate via software) to call emergency contacts.

SOS function for emergencies.

5.9 Changing Watch Dials

Personalize your smartwatch with a variety of exquisite dials.

• Press and hold the watch face on the home screen.
• Swipe left or right to browse available dials.
• Tap to select and apply a new watch face.

A variety of exquisite dials to choose from.

6. Features

• Operating System: Android OS v9.0
• Processor: MTK6761 Eight-core CPU (2.0GHZ quad core + 1.5GHZ quad core)
• Memory: 4GB RAM, 64GB ROM
• Display: 2.08-inch full circle capacitive touch screen, 400x454 resolution
• Camera: HD 5-megapixel CMOS sensor
• Connectivity: 4G LTE (GSM/WCDMA/TDS-CDMA/LTE_FDD/LTE-TDD), WiFi (2.4G/5G), Bluetooth 5.0
• GPS: Built-in GPS, supports A-GPS, Beidou, Granas
• Battery: 930mAh built-in polymer lithium battery
• Waterproof Grade: Life Waterproof (IP67)
• Sensors: Gravity sensor, Heart Rate Monitor
• Functions: Passometer, fitness tracker, sleep tracker, mood tracker, message reminder, call reminder, answer call, dial call, remote control, push message, alarm clock, timer, stopwatch, weather forecast, calendar, music and video playback, GPS navigation, multiple sports modes, one-button power saving, do not disturb mode, wrist light, heart rate warning.
• Supported Languages: English, Russian, Spanish, Polish, Portuguese, Turkish, Italian, French, German, Norwegian, Korean, Japanese, Ukrainian, Hebrew, Dutch, Arabic, Indonesian, Greek.

MTK6761 Eight-core CPU with 4GB RAM + 64GB ROM.

Intelligent heart rate monitoring for health protection.

Multiple exercise modes to improve training efficiency.

7. Maintenance

• Cleaning: Wipe the watch screen and body with a soft, dry cloth. For stubborn smudges, use a slightly damp cloth and immediately dry. Avoid harsh chemicals.
• Water Resistance: The watch is Life Waterproof (IP67). This means it can withstand splashes, rain, and brief immersion. Do not use it for swimming, showering, or diving. Avoid exposing it to hot water or steam.
• Battery Care: To prolong battery life, avoid extreme temperatures. Charge the watch regularly and avoid letting the battery completely drain for extended periods.
• Storage: When not in use for a long time, store the watch in a cool, dry place.

8. Troubleshooting

8.1 Watch Not Turning On

• Ensure the watch is fully charged. Connect it to the charger for at least 30 minutes.
• Press and hold the power button for 10-15 seconds to attempt a forced restart.

8.2 Poor Network Connectivity

• Check if the Nano SIM card is correctly inserted and activated.
• Ensure you are in an area with good 4G or WiFi signal coverage.
• Restart the watch.

8.3 Apps Not Downloading/Working

• Verify stable internet connection (WiFi or 4G).
• Check available storage space (ROM).
• Clear cache for the Google Play Store app in settings.
• Ensure the app is compatible with Android 9.0.

8.4 Bluetooth Connection Issues

• Ensure Bluetooth is enabled on both the watch and the device you are trying to pair.
• Keep the devices within close range (typically 10 meters).
• Try unpairing and re-pairing the devices.

9. Specifications

Dimensions and key parameters of the smartwatch.

10. User Tips

• Bluetooth Calls: Yes, Bluetooth phone calls are available. You can connect Bluetooth headsets for hands-free communication.
• App Compatibility: Since it runs on Android 9.0, most standard Android apps from the Google Play Store should be compatible, but performance may vary depending on the app's optimization for smartwatch screens.
• Battery Optimization: To maximize battery life, consider adjusting screen brightness, limiting background app refresh, and using power-saving modes when available.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or refer to the documentation provided at the time of purchase. Keep your proof of purchase for any warranty claims.