1. Introduction
This manual provides detailed instructions for the safe and efficient use of your DOOGEE T40 PRO 12 Inch Android 14 Tablet. Please read this manual thoroughly before operating the device and keep it for future reference.
The DOOGEE T40 PRO is a high-performance Android 14 tablet featuring a Helio G99 octa-core processor, 20GB RAM, 512GB ROM (expandable to 2TB), a 12-inch 2.4K IPS display, and a 10800mAh battery. It supports dual SIM 4G, 2.4G&5G WiFi, Face Unlock, Bluetooth 5.0, GPS, and OTG functionality.
2. What's in the Box
Upon opening the package, verify that all items listed below are present and in good condition:
- 1x DOOGEE T40 PRO Tablet
- 1x Charger
- 1x Type-C USB Cable
- 1x Protective Film (Pre-applied)
- 1x Tempered Glass Protective Film
- 1x Manual
- 1x Tool for Take Card (SIM Ejector Tool)

Figure 2.1: Package Contents of the DOOGEE T40 PRO Tablet.
3. Device Layout and Controls
Familiarize yourself with the physical layout of your DOOGEE T40 PRO tablet:
- Front Camera: Located at the top center when held horizontally, used for video calls and selfies.
- Display: 12-inch 2.4K IPS screen for visual output and touch input.
- Power Button: Typically on the side, used to turn the device on/off or lock/unlock the screen.
- Volume Buttons: Adjacent to the power button, used to adjust audio volume.
- USB Type-C Port: Located on the bottom edge, used for charging and data transfer.
- SIM/MicroSD Card Slot: On the side, for inserting SIM cards for cellular connectivity and a microSD card for expandable storage.
- Quad Stereo Speakers: Located on the sides for immersive audio output.
- Rear Camera: Located on the back, used for taking photos and videos.
- 3.5mm Headphone Jack: For connecting wired headphones.

Figure 3.1: Front and Rear View of the DOOGEE T40 PRO Tablet.

Figure 3.2: Side Profile of the DOOGEE T40 PRO Tablet.
4. Setup
4.1 Initial Power On and Setup Wizard
- Charge the Tablet: Before first use, fully charge the tablet using the provided charger and Type-C USB cable.
- Power On: Press and hold the Power button until the DOOGEE logo appears.
- Language Selection: Follow the on-screen prompts to select your preferred language.
- Connect to Wi-Fi: Select your Wi-Fi network and enter the password to connect to the internet.
- Google Account Setup: Sign in with your Google account or create a new one. This is essential for downloading apps from the Google Play Store.
- Date & Time: Set the correct date and time, or allow the network to set it automatically.
- Security Setup: Configure screen lock options such as PIN, pattern, password, or Face Unlock.
- Complete Setup: Follow any remaining prompts to finalize the initial setup.
4.2 Inserting SIM and MicroSD Cards
The DOOGEE T40 PRO supports dual SIM 4G and expandable storage via a microSD card.
- Locate the SIM Tray: Find the small hole on the side of the tablet, near the SIM/MicroSD card slot.
- Eject the Tray: Insert the provided SIM ejector tool into the hole and gently push until the tray pops out.
- Insert Cards: Carefully place your Nano-SIM card(s) and/or microSD card into the designated slots on the tray. Ensure they are correctly oriented.
- Reinsert Tray: Gently push the tray back into the slot until it clicks into place.

Figure 4.1: Inserting SIM and MicroSD Cards.
5. Operating the Tablet
5.1 Basic Navigation
- Touch Gestures: Tap, swipe, pinch-to-zoom, and long-press are standard Android gestures.
- Home Screen: The main interface where you can access apps, widgets, and notifications.
- Notification Panel: Swipe down from the top of the screen to access quick settings and notifications.
- App Drawer: Swipe up from the bottom of the screen to view all installed applications.
5.2 Connectivity
- Wi-Fi: Connect to wireless networks for internet access. Supports 2.4GHz and 5GHz bands.
- Mobile Data (4G LTE): Use cellular data for internet access when Wi-Fi is unavailable (requires an active SIM card and data plan).
- Bluetooth 5.0: Connect to wireless headphones, speakers, and other Bluetooth-enabled devices.
- GPS: Utilize location services for navigation and location-based apps.
- OTG (On-The-Go): Connect USB devices such as flash drives, keyboards, or mice using an OTG adapter. The tablet also supports OTG reverse charging to power other devices.

Figure 5.1: Connectivity Options.
Video 5.1: Demonstration of DOOGEE T40 PRO OTG Charging capability, showing the tablet charging another device.
5.3 Multimedia and Display
- 2.4K IPS Display: Enjoy high-resolution visuals on the 12-inch screen. The TÜV-certified blue light filter helps reduce eye strain.
- Quad Stereo Speakers: Experience rich and immersive audio.
- Widevine L1 Support: Stream high-definition content (1080P and higher) from platforms like Netflix and Prime Video.

Figure 5.2: 12-inch 2.4K IPS Display Features.

Figure 5.3: Quad Stereo Speakers.

Figure 5.4: Widevine L1 Support.
5.4 Camera Usage
- Rear Camera: 16MP for capturing photos and videos.
- Front Camera: 8MP for video calls and selfies.

Figure 5.5: Dual Camera System.
6. Battery and Charging
The DOOGEE T40 PRO is equipped with a large 10800mAh battery for extended usage.
- Charging: Use the provided 18W fast charger and Type-C USB cable.
- Battery Life: Optimized for long hours of gaming, streaming, and work.
- Battery Care: To prolong battery lifespan, avoid extreme temperatures and do not let the battery drain completely regularly.

Figure 6.1: 10800mAh Large Battery.
7. Maintenance and Care
- Cleaning: Use a soft, lint-free cloth to clean the screen and body. Avoid harsh chemicals.
- Storage: Store the tablet in a cool, dry place away from direct sunlight and extreme temperatures.
- Software Updates: Regularly check for and install system updates to ensure optimal performance and security.
- Data Backup: Periodically back up important data to a cloud service or external storage device.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tablet does not turn on. | Low battery; software crash. | Charge the tablet for at least 30 minutes. Press and hold the Power button for 10-15 seconds to force restart. |
| Cannot connect to Wi-Fi. | Incorrect password; router issue; Wi-Fi disabled. | Verify password. Restart router. Toggle Wi-Fi off/on in settings. |
| Apps are crashing or freezing. | Insufficient RAM; app incompatibility; corrupted data. | Close background apps. Clear app cache/data. Reinstall app. Update Android OS. |
| Slow performance. | Too many apps running; low storage; outdated software. | Close unused apps. Free up storage space. Update Android OS. |
| Charging port failure. | Physical damage; debris in port. | Inspect port for debris and gently clean. If damaged, contact customer support for repair. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | DOOGEE T40 PRO (Gray) |
| Operating System | Android 14 |
| Processor | Helio G99 Octa-core (2.2 GHz) |
| RAM | 20GB (8GB + up to 12GB extended RAM) |
| Internal Storage | 512GB ROM |
| Expandable Storage | Up to 2TB (TF Card) |
| Display Size | 12 Inches |
| Screen Resolution | 2.4K IPS (2000x1200 Pixels) |
| Battery Capacity | 10800mAh |
| Charging | 18W Fast Charging, OTG Reverse Charging |
| Rear Camera | 16MP |
| Front Camera | 8MP |
| Connectivity | Dual SIM 4G LTE, 2.4G&5G WiFi, Bluetooth 5.0, GPS |
| Dimensions (LxWxH) | 10.98 x 6.86 x 0.3 inches (7.6mm thickness) |
| Weight | 2.64 pounds (approx. 578g) |
| Special Features | Face Unlock, Widevine L1 Support, TÜV SÜD Certified Blue Light Filter, Quad Stereo Speakers |

Figure 9.1: Helio G99 Octa-core Processor.

Figure 9.2: Memory and Storage Configuration.
10. Warranty and Support
DOOGEE provides comprehensive support for your T40 PRO tablet:
- Warranty: 2-year warranty.
- Technical Support: Lifetime technical support.
- Customer Service: 24/7 customer service.
- Returns: 30-day money-back guarantee and free return.
For assistance, please refer to the contact information provided in your warranty card or visit the official DOOGEE support website.

Figure 10.1: DOOGEE Customer Service and Warranty Information.
11. Safety Information
- Do not expose the tablet to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the tablet to severe impact.
- Use only approved chargers and accessories.
- Do not attempt to disassemble or repair the tablet yourself. This will void the warranty.
- Keep the tablet away from children and pets.





