1. Producte acabatview
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.

Característiques principals:
- Suport tribanda: Compatible with 2G, 3G, and 4G networks across various frequency bands (e.g., 850, 900, 1700, 1800, 1900, 2100MHz).
- Guany alt: Up to 70dB gain for significant signal improvement.
- Upgraded Chip: Enhanced stability and interference prevention.
- Visualització en temps real: Numerical display for accurate signal strength monitoring.
- Uniform Heat Dissipation: Optimized design for efficient cooling.
- Àmplia cobertura: Designed to provide wider signal coverage within the vehicle.
2. Contingut del paquet
Si us plau, comproveu que tots els articles siguin presents i en bon estat en desempaquetar-los:

- Signal Booster Unit
- Car Antenna (External Antenna)
- Whip Antenna (Internal Antenna)
- NK-FJ Connector
- Endoll del cotxe
- Cable 2M
3. Instal·lació i configuració
Follow these steps to install your GOBOOST Car Signal Booster:

- 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.
- Encamina el 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.
- 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.
- 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.
- Encès: 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. Instruccions de funcionament
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:

- Receives Signal: The external Car Antenna captures weak cellular signals from the nearest cell tower.
- Boosts Signal: The Signal Booster amplifies the received signal.
- 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. Manteniment
To ensure optimal performance and longevity of your GOBOOST Signal Booster, follow these maintenance guidelines:
- Mantenir les connexions segures: Comproveu periòdicament totes les connexions dels cables per assegurar-vos que estiguin ben ajustades i que no presentin corrosió.
- Neteja la unitat: Use a soft, dry cloth to clean the exterior of the booster unit. Avoid using harsh chemicals or abrasive materials.
- Assegureu-vos una ventilació adequada: The booster is designed with uniform heat dissipation. Ensure that the ventilation holes are not blocked to prevent overheating.
- Protegir dels elements: While the external antenna is designed for outdoor use, protect the internal booster unit from extreme temperatures, direct sunlight, and moisture.

6. Solució De Problemes
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.
- Comproveu les connexions: 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.
- Comproveu si hi ha connexions soltes.

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.
Per a iPhone:

- Dial the code
*3001#12345#*. - Click on "Serving Cell Info".
- Look for "Freq Band Indicator" to find your band number.
Per a Samsung:

- Dial the code
*#0011#. - The frequency information will appear.
For Android (General):

- Download an app like "Cell Mapper" or "Network Cell Info Lite" from your app store.
- Obriu l'aplicació a view the frequency information.
7. Especificacions
| Atribut | Valor |
|---|---|
| Nom de marca | GOBOOST |
| Número de model | GB20-3 BAND |
| Guançament (dB) | 70 dB |
| Certificació | CE |
| Supported Bands (Exampel 1) | Band5 Band4 Band2 (850 1700 1900MHz) |
| Supported Bands (Exampel 2) | Band1 Band3 Band5 (850 1800 2100MHz) |
| Supported Bands (Exampel 3) | GSM Band1 Band3 (900 1800 2100MHz) |
| Supported Bands (Exampel 4) | GSM Band3 Band5 (850 900 1800MHz) |
| Supported Bands (Exampel 5) | GSM Band1 Band5 (850 900 2100MHz) |
| Cobertura | 300-800sqm without barriers (in optimal conditions) |
| Ample de banda | 25M+75M+60M |
| Impedància | 50 ohms |
| Connector RF | F-K; SMA-K |
| Font d'alimentació | AC:100~240V, 50/60Hz, DC:5V 1.5A |
| Funció | Strengthen cellular cell phone signal network |
| Origen | Xina continental |
| Lloc aplicable | Car, Home, Office, Garage, Hotel, Village, Shopping Mall (for general signal boosting) |
8. Garantia i Suport
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. Consells d'usuari
- Col·locació òptima de l'antena: 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.
- Assegureu totes les connexions: Loose connections can significantly degrade performance. Double-check all cables are tightly fastened.
- Pantalla del monitor: Use the booster's real-time numerical display to gauge the effectiveness of your setup and make adjustments as needed.



