1. Introduction
Welcome to the user manual for your new SERVO F21 Slide 4G LTE Android Smartphone. This device combines a classic slide design with modern smartphone functionalities, offering a unique user experience. It features a 3.0-inch HD touch screen, 4G LTE connectivity, dual SIM capability, and runs on Android 8.1. This manual will guide you through the setup, operation, and maintenance of your phone to ensure optimal performance.
2. Package Contents
Please check the box for the following items:
- 1x SERVO F21 Slide Phone (including pre-installed battery)
- 1x Type-C Charging Cable
- 1x User Manual (this document and a physical copy)
- 1x Card Removal Pin
- 1x Retail Box
Note: This product does not include a SIM card or a charging adapter. Please purchase a compatible 5V1A charger separately if needed.
3. Product Overview
The SERVO F21 Slide features a unique slide mechanism revealing a physical keyboard, alongside its touch screen interface. Below are the key physical features and button details:
3.1 Physical Dimensions
- Appearance: 136mm × 52mm × 19mm
- Weight: 135g
3.2 Button Details
The phone is equipped with several physical buttons for easy operation:
- Volume Buttons: Located on the side, for adjusting audio levels.
- Flashlight Shortcut Button: On the side, for quick access to the flashlight.
- Power Button: For turning the device on/off or locking/unlocking the screen.
- Answer Button: For accepting incoming calls.
4. Specifications
| Feature | Specification |
|---|---|
| Model | F21 Slide |
| Appearance Dimensions | 136mm × 52mm × 19mm |
| Weight | 135g |
| Screen Size | 3.0 inch HD Screen |
| Display Resolution | 480x320 |
| Screen Material | IPS |
| Touch Screen | Yes |
| Rear Camera | 2 MP |
| Front Camera | 2 MP |
| SIM Card Quantity | 2 Nano SIM cards |
| Memory Card Type | Dedicated slot (TF Card, up to 32GB expandable) |
| RAM | 2GB |
| ROM | 16GB |
| Battery Capacity | 2000mAh |
| Battery Type | Not Detachable |
| Charging Interface Type | Type-C |
| Charging Power | Other (Requires 5V1A charger) |
| Bluetooth Version | YES |
| Audio Playback | Support |
| Video Playback | Support |
| WIFI | Support |
| GPS | Support |
| NFC | No |
| Fast Charging | Nonsupport |
| Wireless Charging | No |
| Biometrics Technology | No |
| Operation System | Android 8.1 |
| CPU Model | MTK MT6737 |
| Supported Languages | Arabic, Polish, German, Russian, French, Korean, Norwegian, Portuguese, Japanese, Turkish, Spanish, Italian, English, and more. |
| 2G GSM Networks | Quad Band (B2(1900)/B3(1800)/B5(850)/B8(900)) |
| 3G WCDMA Networks | B1(2100)/B2(1900)/B4(1700)/B5(850)/B8(900) |
| 4G TDD Networks | B38/40/41 |
| 4G FDD Networks | B1/2/3/4/5/7/8/20/28AB |
| Item Condition | New |
| Origin | Mainland China |
| Certification | CE |
5. Setup
5.1 SIM Card and Memory Card Installation
The SERVO F21 Slide supports two Nano SIM cards and one TF (MicroSD) memory card for expanded storage. Use the provided card removal pin to access the SIM/memory card tray.
- Locate the SIM/memory card tray on the side of the phone.
- Insert the card removal pin into the small hole next to the tray and push gently until the tray ejects.
- Place your Nano SIM cards and TF memory card into the designated slots on the tray. Ensure they are correctly oriented.
- Carefully reinsert the tray into the phone until it clicks into place.
5.2 Initial Charging
Before first use, it is recommended to fully charge your phone. Use the provided Type-C charging cable and a compatible 5V1A charging adapter (not included).
- Connect the Type-C cable to the phone's charging port.
- Connect the other end of the cable to a 5V1A charging adapter.
- Plug the adapter into a power outlet.
- Charge the phone for 3-5 hours for the first use to ensure the battery is fully conditioned.
6. Operating Instructions
6.1 Power On/Off and Screen Lock
- Power On: Press and hold the Power button until the screen lights up.
- Power Off: Press and hold the Power button, then select "Power off" from the options.
- Screen Lock/Unlock: Briefly press the Power button to lock or unlock the screen.
6.2 Basic Navigation
The SERVO F21 Slide offers both touch screen and physical keyboard navigation:
- Touch Screen: Tap, swipe, and pinch to interact with the Android interface.
- Physical Keyboard: Slide the screen up to reveal the alphanumeric keypad for dialing, typing messages, and navigating menus. The physical buttons provide a tactile experience, reducing accidental touches.
6.3 Making Calls and Sending Messages
Use the Phone app for calls and the Messaging app for SMS. The physical keyboard makes dialing and typing efficient.
6.4 Camera Usage
The phone is equipped with a 2MP rear camera and a 2MP front camera to capture your moments.
- Open the Camera app from the home screen or app drawer.
- Switch between front and rear cameras as needed.
- Tap the shutter button to take a photo.
6.5 Internet Access and Apps
The phone supports 4G LTE for high-speed mobile data and Wi-Fi for local network access.
- 4G LTE: Insert a 4G compatible SIM card to access mobile internet.
- Wi-Fi: Connect to available Wi-Fi networks via Settings > Network & Internet > Wi-Fi.
- Wi-Fi Hotspot Sharing: Share your phone's internet connection with other devices via Wi-Fi hotspot.
- App Downloads: Access the Google Play Store to download a wide range of applications.
6.6 FM Radio
The phone includes an FM Radio function, allowing you to listen to local radio stations without an internet connection. This is useful for news, music, or talk shows on the go.
6.7 Flashlight
The phone features a convenient one-button flashlight shortcut on the side. Pressing this button quickly activates the LED strong light for emergency lighting without needing to unlock the phone.
7. Maintenance
7.1 Battery Care
- To prolong battery life, avoid extreme temperatures.
- Use only the provided Type-C cable and a compatible 5V1A charger.
- If the phone will not be used for an extended period, charge it to about 50% before storing.
7.2 Cleaning Your Device
Use a soft, lint-free cloth to clean the screen and body of the phone. Avoid using harsh chemicals or abrasive materials that could damage the device.
8. Troubleshooting
8.1 Phone Does Not Turn On After Charging
If the mobile phone has not been used for a long time, the battery power may have been completely depleted. In this case:
- Charge the phone for 3-5 hours using the provided Type-C cable and a 5V1A charger.
- Attempt to power on the device again.
8.2 Network Connectivity Issues
The SERVO F21 Slide supports specific 2G, 3G, and 4G network bands. Please be aware that due to network frequency band compatibility issues, the mobile phone may not function normally in certain countries, including:
- Colombia
- India
- Türkiye
- Chile
- Azerbaijan
- Tanzania
- Australia
Please verify network compatibility in your region before use.
9. User Tips
- Available Storage: The advertised ROM (16GB) indicates the maximum storage. The Android operating system and pre-installed apps will occupy a portion of this, resulting in less available storage for user data.
- Performance Testing: Be cautious when using third-party apps or devices to test phone performance or specifications, as their accuracy and professionalism cannot be guaranteed.
- Unboxing Video: For any potential issues upon receiving the product, it is highly recommended to record an unboxing video. This can be helpful for support and returns.
10. Warranty and Support
For any product-related inquiries, technical support, or warranty claims, please contact the seller directly. It is important to keep the product in its original condition, including the box and all accessories, for any return or refund processes.
A detailed user manual in PDF format is available for download. You can access it via this link: SERVO F21 Slide User Manual (PDF).
