Introduction
Welcome to the user manual for your Samsung Galaxy S8+ Plus SM-G955FD. This guide provides essential information to help you get started, operate, maintain, and troubleshoot your device. The Samsung Galaxy S8+ Plus is a powerful Android smartphone featuring a 6.2-inch AMOLED display, 64GB internal storage, 4GB RAM, and dual SIM capability, running on Android 7.0.

Figure 1: Front and rear view of the Samsung Galaxy S8+ Plus SM-G955FD. The front displays the edge-to-edge screen with icons indicating dual SIM support. The rear shows the camera module, fingerprint sensor, and Samsung branding. A red circular badge indicates a 1-year factory unlock warranty.
What's in the Box
Upon opening your Samsung Galaxy S8+ Plus SM-G955FD package, please ensure all the following items are present:
- Samsung Galaxy S8+ Plus SM-G955FD Smartphone
- Power Adapter
- USB Cable
- (Note: Other accessories like headphones or SIM ejector tool may vary by region and package contents.)
Setup
1. SIM Card Installation
The Samsung Galaxy S8+ Plus SM-G955FD supports dual SIM cards.
- Locate the SIM card tray on the top edge of the device.
- Insert the SIM ejector tool (if provided, or a small paperclip) into the small hole on the tray to open it.
- Place your Nano-SIM card(s) into the tray with the gold contacts facing down. Ensure they are correctly seated.
- Carefully reinsert the tray into the phone until it clicks into place.
2. Initial Charging
Before first use, it is recommended to fully charge your device.
- Connect the USB cable to the power adapter.
- Plug the adapter into a wall outlet.
- Connect the USB cable to the charging port at the bottom of your phone.
- The charging indicator will appear on the screen.
3. Powering On and Initial Setup
To power on your device:
- Press and hold the Power/Lock button (located on the right side of the phone) until the Samsung logo appears.
- Follow the on-screen prompts to complete the initial setup, including language selection, Wi-Fi connection, Google account setup, and security settings (fingerprint, iris scanner, PIN/pattern).
Operating Your Device
Basic Navigation
The Galaxy S8+ Plus features an intuitive touchscreen interface.
- Tap: Select an item or open an application.
- Swipe: Move between screens or scroll through lists.
- Pinch: Zoom in or out on images and web pages.
- Long Press: Access contextual menus or move icons.
Dual SIM Functionality
With dual SIM support, you can use two different phone numbers or carriers on one device.
- Navigate to Settings > Connections > SIM card manager.
- Here you can activate/deactivate SIM cards, set preferred SIM for calls, messages, and mobile data.
Special Features
- Iris Scanner: For enhanced biometric security, register your iris in Settings > Lock screen and security > Iris scanner.
- IP68 Certified: The device is resistant to dust and water. Avoid intentional submersion and exposure to high-pressure water.
- Corning Gorilla Glass 5: Provides enhanced durability and scratch resistance for the display.
Maintenance
Device Care and Cleaning
- Use a soft, lint-free cloth to clean the screen and body.
- Avoid using harsh chemicals or abrasive materials.
- Keep the device away from extreme temperatures and direct sunlight.
Software Updates
Regularly check for software updates to ensure optimal performance and security.
- Go to Settings > Software update > Download and install.
- Ensure your device is connected to Wi-Fi and has sufficient battery charge before starting an update.
Troubleshooting
If you encounter issues with your device, try the following common solutions:
- Device not responding: Press and hold the Power and Volume Down buttons simultaneously for about 7-10 seconds to force restart the device.
- Network issues: Check if your SIM card is properly inserted. Try toggling Airplane mode on and off.
- App crashing: Clear the app's cache and data in Settings > Apps > [App Name] > Storage. If the issue persists, uninstall and reinstall the app.
- Battery drain: Review battery usage in Settings > Device care > Battery to identify power-consuming apps. Adjust screen brightness and disable unnecessary features.
- Slow performance: Clear cache partition (Power off, then press and hold Power + Volume Up + Bixby button until Samsung logo appears, then release. Use volume keys to navigate to 'Wipe cache partition' and power key to select).
- Factory Reset (Last Resort): If problems persist, you may need to perform a factory data reset. Warning: This will erase all data on your device. Back up important data before proceeding. Go to Settings > General management > Reset > Factory data reset.
Specifications
Key technical specifications for the Samsung Galaxy S8+ Plus SM-G955FD:
| Feature | Detail |
|---|---|
| Model Number | SM-G955FD |
| Operating System | Android 7.0 |
| Display | 6.2 Inches AMOLED, 1440 x 2960 Resolution |
| RAM | 4 GB |
| Storage Capacity | 64 GB |
| SIM Type | Dual SIM (Nano-SIM) |
| Connectivity | Wi-Fi, Cellular (2G, 3G, 4G LTE support) |
| Special Features | IP68 certified, Iris scanner, Corning Gorilla Glass 5, GPS |
| Dimensions | 3.94 x 2.76 x 1.97 inches |
| Item Weight | 16 ounces |
| Audio Jack | No headphone jack |
Warranty and Support
Your Samsung Galaxy S8+ Plus SM-G955FD comes with a 1-year factory unlock warranty. For warranty claims or technical support, please refer to the official Samsung support channels in your region.
You can find more information and support resources on the official Samsung website: Samsung Support





