GOBOOST GB20-3 BAND Tri-Band Car Signal Booster Instruction Manual

1. Product Overview

The GOBOOST GB20-3 BAND Tri-Band Car Signal Booster is designed to enhance 2G, 3G, and 4G cellular network signals within your vehicle. It features a high-gain 70dB amplifier and an upgraded chip to prevent signal interference and ensure stable performance. The device supports multiple frequency bands, making it suitable for various regions worldwide.

Key Features:

• Tri-Band Support: Compatible with 2G, 3G, and 4G networks across various frequency bands (e.g., 850, 900, 1700, 1800, 1900, 2100MHz).
• High Gain: Up to 70dB gain for significant signal improvement.
• Upgraded Chip: Enhanced stability and interference prevention.
• Real-time Display: Numerical display for accurate signal strength monitoring.
• Uniform Heat Dissipation: Optimized design for efficient cooling.
• Wide Coverage: Designed to provide wider signal coverage within the vehicle.

2. Package Contents

Please verify that all items are present and in good condition upon unpacking:

• Signal Booster Unit
• Car Antenna (External Antenna)
• Whip Antenna (Internal Antenna)
• NK-FJ Connector
• Car Power Plug
• 2M Cable

3. Installation and Setup

Follow these steps to install your GOBOOST Car Signal Booster:

1. Mount the Car Antenna: Securely attach the Car Antenna (external antenna) to the exterior of your vehicle, typically on the roof or trunk, ensuring it has a clear line of sight to cell towers.
2. Route the Cable: Carefully route the 2M cable from the Car Antenna into the vehicle's interior to the location where the Signal Booster will be placed.
3. Connect External Antenna: Connect the routed cable from the Car Antenna to the 'BTS' port on the Signal Booster using the NK-FJ Connector if necessary.
4. Connect Internal Antenna: Attach the Whip Antenna (internal antenna) to the 'MS' port on the Signal Booster. Position the Whip Antenna inside the vehicle where you need improved signal, ensuring it is not too close to the external antenna to prevent oscillation.
5. Power On: Plug the Car Power Plug into your vehicle's 12V power outlet and connect the other end to the Signal Booster's power input. The booster will power on automatically.

4. Operating Instructions

Once installed and powered on, the GOBOOST Signal Booster will automatically begin to amplify the cellular signal. Observe the display for real-time signal strength information.

Signal Strength Display:

The booster features a unique numerical display that shows the signal strength for each channel (CH1, CH2, CH3) in dB and dBm, providing accurate feedback on the booster's performance.

How the Booster Works:

1. Receives Signal: The external Car Antenna captures weak cellular signals from the nearest cell tower.
2. Boosts Signal: The Signal Booster amplifies the received signal.
3. Broadcasts Signal: The internal Whip Antenna broadcasts the amplified signal within your vehicle, providing improved reception to your mobile devices. Simultaneously, your device's outgoing signals are captured by the Whip Antenna, amplified by the booster, and sent back to the cell tower via the Car Antenna.

5. Maintenance

To ensure optimal performance and longevity of your GOBOOST Signal Booster, follow these maintenance guidelines:

• Keep Connections Secure: Periodically check all cable connections to ensure they are tight and free from corrosion.
• Clean the Unit: Use a soft, dry cloth to clean the exterior of the booster unit. Avoid using harsh chemicals or abrasive materials.
• Ensure Proper Ventilation: The booster is designed with uniform heat dissipation. Ensure that the ventilation holes are not blocked to prevent overheating.
• Protect from Elements: While the external antenna is designed for outdoor use, protect the internal booster unit from extreme temperatures, direct sunlight, and moisture.

6. Troubleshooting

If you experience issues with your signal booster, refer to the following common problems and solutions:

No Signal Improvement:

• Check Antenna Separation: Ensure sufficient physical separation (at least 10 meters or 30 feet) between the external and internal antennas to prevent oscillation.
• Verify External Antenna Placement: The external antenna needs a clear view of the sky and the nearest cell tower. Adjust its position if necessary.
• Confirm Frequency Band: Ensure the booster supports the frequency bands used by your mobile carrier. See 'How to Check Your Phone's Frequency Band' below.
• Check Connections: Make sure all cables are securely connected to the correct ports on the booster and antennas.

Interference or Oscillation:

• Increase the distance between the external and internal antennas.
• Ensure the external antenna is pointing away from the internal antenna.
• Check for loose connections.

How to Check Your Phone's Frequency Band:

It is crucial to know your phone's operating frequency band to ensure compatibility with the signal booster.

For iPhone:

1. Dial the code *3001#12345#*.
2. Click on "Serving Cell Info".
3. Look for "Freq Band Indicator" to find your band number.

For Samsung:

1. Dial the code *#0011#.
2. The frequency information will appear.

For Android (General):

1. Download an app like "Cell Mapper" or "Network Cell Info Lite" from your app store.
2. Open the app to view the frequency information.

7. Specifications

8. Warranty and Support

The GOBOOST Signal Booster comes with a one-year warranty from the date of purchase. In case of product defects or malfunctions, please contact the seller with proof of purchase. You may be asked to provide videos or pictures to demonstrate the issue and follow installation suggestions for troubleshooting.

For any issues regarding the product, please contact customer support for prompt assistance.

9. User Tips

• Optimal Antenna Placement: Experiment with the placement of your external antenna to find the best signal reception point on your vehicle. A higher position often yields better results.
• Maximize Separation: Ensure maximum possible distance between the external and internal antennas to prevent feedback and optimize performance.
• Secure All Connections: Loose connections can significantly degrade performance. Double-check all cables are tightly fastened.
• Monitor Display: Use the booster's real-time numerical display to gauge the effectiveness of your setup and make adjustments as needed.