1. Introduction
This manual provides detailed instructions for the proper use and maintenance of your Teclast M20 Android Tablet. Please read this manual thoroughly before operating the device to ensure optimal performance and longevity.
The Teclast M20 is a high-performance Android tablet featuring a 10.1-inch IPS display, Deca Core processor, 4GB RAM, 64GB ROM, dual 4G network support, and dual-band Wi-Fi connectivity.

Image 1.1: The Teclast M20 Android Tablet, showcasing its sleek metal back cover and rear camera.
2. Product Overview
Familiarize yourself with the physical components of your Teclast M20 tablet.

Image 2.1: Teclast M20 Tablet with labeled ports and buttons. This diagram shows the location of the Micro USB port, earphone jack, front camera, volume buttons, power button, speakers, microphone, rear camera, and TF/SIM card slot.
- Micro USB Slot: For charging and data transfer.
- 3.5mm Headphone Jack: For connecting headphones.
- Front Camera: For video calls and selfies (5MP).
- Rear Camera: For taking photos and videos (2MP).
- Volume Buttons: Adjust audio volume.
- Power Button: Power on/off, sleep/wake.
- Speakers: Built-in dual channel speakers for audio output.
- Microphone: For voice input.
- TF/SIM Card Slot: For inserting a TF (MicroSD) card and SIM cards.
3. Setup
3.1 Charging the Tablet
Before first use, fully charge the tablet. Connect the provided USB cable to the Micro USB slot on the tablet and the other end to a compatible USB power adapter. The charging indicator will show the charging status. A full charge typically takes 5-6 hours.
3.2 Inserting SIM and TF Cards
The Teclast M20 supports dual SIM cards for 4G connectivity and a TF (MicroSD) card for expandable storage up to 256GB.
- Locate the TF/SIM card slot on the side of the tablet (refer to Image 2.1).
- Carefully open the card tray using the provided SIM ejector tool or a thin pin.
- Place the SIM cards and TF card into their respective slots on the tray, ensuring correct orientation.
- Gently push the tray back into the tablet until it clicks into place.

Image 3.1: Illustration of inserting SIM cards and a TF card into the tablet's dedicated slot.
3.3 Initial Power On and Setup
Press and hold the Power button until the Teclast logo appears. Follow the on-screen prompts to complete the initial setup, including language selection, Wi-Fi connection, Google account login, and security settings.
4. Operating Instructions
4.1 Basic Navigation (Android 8.0)
The Teclast M20 runs on Android 8.0 Oreo. Use touch gestures to navigate:
- Tap: Select an item.
- Tap & Hold: Access contextual menus or move icons.
- Swipe: Scroll through screens or lists.
- Pinch: Zoom in or out on images and web pages.
4.2 Connecting to Wi-Fi
To access the internet, connect your tablet to a Wi-Fi network:
- Go to Settings > Network & Internet > Wi-Fi.
- Toggle Wi-Fi On.
- Select your desired network from the list.
- Enter the password if prompted and tap Connect.
The Teclast M20 supports dual-band Wi-Fi (2.4GHz/5.0GHz) for faster and more stable connections (802.11 ac standard).

Image 4.1: Visual representation of the tablet's dual-band Wi-Fi capability (2.4GHz and 5GHz).
4.3 Using 4G Network
With inserted SIM cards, your tablet can connect to 4G mobile networks for internet access and calls.
- Ensure SIM cards are correctly inserted (refer to Section 3.2).
- Go to Settings > Network & Internet > Mobile network.
- Enable mobile data and configure APN settings if necessary (contact your service provider for details).
4.4 Camera Usage
Open the Camera app from the home screen or app drawer. Tap the shutter button to take photos or switch to video mode to record. Use the front camera for selfies and video calls, and the rear camera for general photography.
4.5 Battery Management
The Teclast M20 is equipped with a 6600mAh Li-ion polymer battery, providing up to 8 hours of usage. To optimize battery life:
- Adjust screen brightness.
- Disable Wi-Fi, Bluetooth, or GPS when not in use.
- Close unused applications running in the background.
- Enable battery saver mode in Settings.

Image 4.2: The Teclast M20 tablet displaying content, highlighting its extended battery life of up to 8 hours.

Image 4.3: The Teclast M20 tablet in use, displaying a high-definition car racing game, demonstrating its immersive display and processing power for entertainment.
5. Maintenance
5.1 Cleaning the Tablet
Use a soft, lint-free cloth to clean the screen and body of the tablet. Avoid using harsh chemicals or abrasive materials. Do not spray cleaners directly onto the screen.
5.2 Software Updates
Periodically check for system updates to ensure your tablet has the latest features and security patches. Go to Settings > System > System update.
5.3 Storage Optimization
To maintain optimal performance, regularly clear unnecessary files and uninstall unused applications. You can also move large files to an external TF card.
6. Troubleshooting
- Tablet does not power on: Ensure the battery is charged. Connect the charger and wait a few minutes before attempting to power on again.
- Wi-Fi connection issues: Check if Wi-Fi is enabled. Restart your router and the tablet. Ensure you have entered the correct password.
- Slow performance: Close background applications. Clear cache and data for frequently used apps. Consider a factory reset if issues persist (backup data first).
- SIM card not detected: Ensure the SIM card is correctly inserted and activated by your service provider. Restart the tablet.
- Screen unresponsive: Restart the tablet by holding the power button for approximately 10 seconds.
7. Specifications
| Feature | Detail |
|---|---|
| Model | M20 |
| Operating System | Android 8.0 Oreo |
| CPU | MTK MT6797(X23) Deca Core (2*A72 2.6Ghz, 4*A53 2.0Ghz, 4*A53 1.6Ghz) |
| GPU | ARM-MALI T880 MP4 |
| RAM | 4GB |
| ROM | 64GB |
| External Memory | TF card up to 256GB (not included) |
| Screen Size | 10.1 inch |
| Screen Type | Capacitive (10-Point) IPS |
| Screen Resolution | 2560 x 1600 IPS |
| Network Support | Dual 4G (GSM, WCDMA, LTE), Dual WiFi 2.4GHz/5.0GHz (802.11 ac) |
| Bluetooth | 4.0 |
| GPS | Yes |
| Front Camera | 5MP |
| Back Camera | 2MP |
| Battery Capacity | 6600mAh Li-ion polymer battery |
| Charging Time | 5-6 hours |
| Material | All Metal back cover |
| Ports | Micro USB Slot, 3.5mm Headphone Jack, TF/SIM Card Slot |

Image 7.1: Teclast M20 tablet showcasing its key specifications including processor, 4G network, display, resolution, memory, storage, multi-touch, dual-band Wi-Fi, and metal body.

Image 7.2: The Teclast M20 tablet demonstrating its ARM Mali-T880 MP4 GPU performance at 780MHz, capable of handling mobile games.
8. Warranty and Support
For warranty information and customer support, please refer to the warranty card included with your product or visit the official Teclast website. Keep your purchase receipt as proof of purchase.
Common support topics include:
- Product registration
- Technical assistance
- Repair services
- Software updates





