1. Introduction
This manual provides essential information for setting up, operating, and maintaining your DOOGEE N55PLUS Unlocked Cell Phone. Please read it carefully to ensure proper use and to maximize the device's capabilities. The DOOGEE N55PLUS is an Android 14 smartphone featuring a 6.56-inch HD+ 90Hz display, an Octa-Core processor, 20GB RAM (8GB physical + 12GB virtual), 128GB internal storage expandable up to 1TB, a 5150mAh battery, and a 13MP AI main camera.
2. What's in the Box
- 1 x DOOGEE N55PLUS Cell Phone
- 1 x Charger
- 1 x Type-C Port Cable
- 1 x TP Protective film (pre-applied)
- 1 x TPU Protective case
3. Setup
3.1 SIM Card and TF Card Installation
- Locate the SIM card tray on the side of your phone.
- Insert the SIM ejector tool (if provided) into the small hole next to the tray and push gently until the tray pops out.
- Place your Nano-SIM card(s) and/or TF card into the designated slots on the tray. Ensure the gold contacts are facing down. The phone supports dual 4G SIM cards (nano SIM1 + nano SIM2) or one nano SIM and one TF card for storage expansion.
- Carefully reinsert the tray into the phone until it clicks into place.

3.2 Powering On/Off
- To Power On: Press and hold the Power button (located on the right side) until the DOOGEE logo appears.
- To Power Off: Press and hold the Power button until the power options menu appears. Tap 'Power off' and confirm.
- To Restart: From the power options menu, tap 'Restart' and confirm.
3.3 Initial Setup
Upon first power-on, follow the on-screen prompts to complete the initial setup. This includes selecting your language, connecting to Wi-Fi, setting up your Google account, and configuring security features like Face Unlock.
4. Operating Your Phone
4.1 Display and Navigation
The DOOGEE N55PLUS features a 6.56-inch HD+ Waterdrop screen with a 90Hz refresh rate, providing a smooth visual experience. Navigate the interface using touch gestures: tap to select, swipe to scroll, pinch to zoom.

4.2 Camera Functions
The phone is equipped with a 13MP AI main camera and an 8MP front camera. Open the Camera app to capture photos and videos. Various modes such as Portrait, Pro Mode, Beauty, Night mode, and Panorama are available to enhance your photography.

4.3 Performance and Storage
Powered by an Octa-Core processor and 20GB RAM (8GB physical + 12GB virtual), the N55PLUS ensures smooth multitasking and app performance. It comes with 128GB of internal storage, expandable up to 1TB using a TF card, providing ample space for your files, photos, and applications.

4.4 Battery Management
The 5150mAh large battery provides extended usage time. To optimize battery life, manage background app usage, adjust screen brightness, and enable power-saving modes when needed. The phone supports OTG reverse charging, allowing it to charge other devices.

5. Connectivity
- Network: Supports 4G global network bands (GSM, WCDMA, TDD, FDD). Ensure your SIM card is compatible with the phone's supported bands for optimal service.
- Wi-Fi: Connect to available Wi-Fi networks for internet access.
- Bluetooth: Pair with Bluetooth devices such as headphones, speakers, or car systems.
- GPS: Integrated GPS, Glonass, Galileo, and Beidou for accurate navigation.
- USB Type-C: For charging and data transfer.
6. Maintenance
6.1 Software Updates
Regularly check for and install software updates to ensure your phone has the latest features, security patches, and performance improvements. Go to Settings > System > System update.
6.2 Cleaning Your Device
Use a soft, lint-free cloth to clean the screen and body of your phone. Avoid using harsh chemicals or abrasive materials that could damage the device.
6.3 Storage Management
To maintain optimal performance, periodically clear unnecessary files, uninstall unused apps, and transfer large media files to external storage or cloud services. Go to Settings > Storage to manage your device's storage.
7. Troubleshooting
- Phone not turning on: Ensure the battery is charged. Connect the phone to the charger and wait a few minutes before attempting to power on again.
- Apps crashing or freezing: Close and restart the app. If the issue persists, clear the app's cache (Settings > Apps > [App Name] > Storage > Clear cache) or uninstall and reinstall the app.
- Poor network signal: Check if your SIM card is properly inserted. Move to an area with better network coverage. Contact your service provider if the issue persists.
- Battery draining quickly: Reduce screen brightness, disable unused features like Wi-Fi or Bluetooth, and close background apps. Check battery usage in Settings to identify power-hungry apps.
- Face Unlock not working: Ensure your face is well-lit and clearly visible to the front camera. Re-register your face data in Settings > Security > Face Unlock.
8. Specifications
| Feature | Specification |
|---|---|
| Model Name | N55 Plus |
| Operating System | Android 14 |
| Processor | Octa-Core (Mediatek Dimensity 1100, 3.2 GHz) |
| RAM | 8 GB (expandable to 20 GB with virtual RAM) |
| Internal Storage | 128 GB |
| Expandable Storage | Up to 1 TB via TF card |
| Screen Size | 6.56 Inches |
| Display Type | HD+ IPS Waterdrop Screen |
| Resolution | 1612 x 720 |
| Refresh Rate | 90 Hz |
| Main Camera | 13 MP AI Camera |
| Front Camera | 8 MP |
| Battery Capacity | 5150 mAh Lithium Ion |
| Connectivity | 4G LTE, Wi-Fi, Bluetooth, USB Type-C |
| Navigation | GPS, Glonass, Galileo, Beidou |
| Special Features | Dual SIM, Expandable Memory, Face Unlock, Widevine L1, OTG |
| Dimensions | 6.45 x 2.98 x 0.34 inches (8.6mm thickness) |
| Weight | 6.6 ounces (186 Grams) |
9. Warranty and Support
All DOOGEE unlocked phones purchased from our official channels are covered by a 12-month warranty. If you encounter any issues during use, please contact our customer support for assistance. For further support, visit the official DOOGEE website or refer to the contact information provided with your purchase.