1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of your GOBOOST 4G Signal Amplifier, Model GB23-LTE-B28. This device is designed to enhance 700MHz (Band 28) mobile cellular signals, providing better voice quality and faster data speeds in areas with weak signal coverage.
Atenció important: This equipment kit is specifically designed to enhance the 700MHz (Band 28) signal. Before purchasing and installing, please ensure that your current SIM card operates on this frequency. Additionally, confirm that the outdoor installation location has a detectable Band 28 (700MHz) signal, ideally with at least 3 signal levels or more. The device may not function correctly if the frequency is mismatched or if the outdoor signal source is too weak.
2. Contingut del paquet
Si us plau, comproveu el contingut del paquet per assegurar-vos que hi hagi tots els elements:
- 1 x GOBOOST Signal Booster (GB23-LTE-B28)
- 1 x Outdoor Antenna (Yagi Antenna)
- 1 x Indoor Antenna (Whip Antenna)
- 1 x cable coaxial
- 1 x Power Adapter (Plug type may vary based on region)

3. Especificacions
| Característica | Descripció |
|---|---|
| Número de model | GB23-LTE-B28 |
| Banda de freqüència | Banda 28 (700 MHz) |
| Frequency Range (LTE 700) | UL: 703-748MHz, DL: 758-803MHz |
| Guanyar | 70 dB |
| Potència de sortida | 23dBm |
| Cobertura | Approximately 250 sqm (without barrier) |
| Característiques | LCD display, Heat dissipation (Aluminum Alloy Shell) |
| Funció | Mobile Signal Booster Repeater, Better voice quality, Faster uploads and downloads, Fewer dropped calls |
| Font d'alimentació | CA: 100-240V |
| Certificació | CE |
| Dimensions (Booster) | 185cm x 82cm x 20cm (approximate) |
4. Configuració i instal·lació
The GOBOOST signal amplifier system works by capturing weak outdoor signals, amplifying them, and then rebroadcasting them indoors. Follow these steps for optimal performance:

4.1 Passos d'instal·lació anteriorsview
- Find a suitable location for the Outdoor Antenna: This antenna should be installed in a position where it can receive the strongest possible signal from the nearest cell tower.
- Connect the Outdoor Antenna to the Signal Booster: Use the provided coaxial cable to connect the outdoor antenna to the 'Outdoor Port' (F-Female Connector) on the signal booster.
- Connect the Indoor Antenna to the Signal Booster: Connect the indoor antenna to the 'Indoor Port' (SMA-Female Connector) on the signal booster.
- Connecteu l'adaptador de corrent: Plug the power adapter into the signal booster and then into a power outlet.

4.2 Detailed Installation Guidelines

- Step 1: Find a position for the outdoor antenna.
Install the outdoor antenna in a location with the strongest possible signal. Use your mobile phone to check the signal strength in various outdoor spots. The higher the signal bars, the better. Ensure the outdoor antenna is pointed towards the nearest cell tower. - Step 2: Connect the outdoor antenna to the booster.
Securely connect the coaxial cable from the outdoor antenna to the 'Outdoor Port' (F-Female Connector) on the signal booster. - Step 3: Connect the indoor antenna to the booster.
Connect the indoor antenna to the 'Indoor Port' (SMA-Female Connector) on the signal booster. Position the indoor antenna where you need signal coverage, ensuring it is as far as possible from the outdoor antenna and ideally separated by a wall or ceiling. - Step 4: Connect the power plug.
Plug the power adapter into the signal booster's power input and then into a wall outlet. The booster will power on, and the LCD display should activate.
5. Instruccions de funcionament
Once installed and powered on, the GOBOOST signal amplifier will automatically begin to boost the signal. The LCD display provides real-time information about its operational status.
5.1 Pantalla LCD

The LCD display clearly shows the work status, including:
- Indicadors de força del senyal: Bars indicating the strength of the received signal. More bars mean a stronger signal.
- GUANY: Mostra el amplification gain, typically 70dB for this model.
- SORTIDA: Shows the output power, typically 23dBm for this model.
Monitor the display to ensure the booster is receiving and amplifying the signal effectively. If the signal strength indicators are low or absent, refer to the Troubleshooting section.
6. Manteniment
The GOBOOST signal amplifier is designed for low maintenance. Follow these general guidelines:
- Keep the signal booster clean and free from dust. Use a soft, dry cloth for cleaning.
- Ensure proper ventilation around the unit to prevent overheating. The aluminum alloy shell is designed for heat dissipation.
- Eviteu exposar la unitat a temperatures extremes, humitat o llum solar directa.
- Comproveu regularment totes les connexions dels cables per assegurar-vos que estiguin ben fixades.
7. Solució De Problemes
If you experience issues with your signal amplifier, consulteu els següents problemes i solucions habituals:
7.1 No Signal Receipt After Activation
- Check Outdoor Antenna Alignment: Ensure the outdoor antenna is correctly pointed towards the nearest cell tower. Slight adjustments can significantly improve signal reception.
- Verify Outdoor Signal Strength: Confirm that the outdoor location where the antenna is installed has a strong enough signal (at least 3 bars on your mobile phone). If the outdoor signal is too weak, the booster has little to amplificar.
- Frequency Match: Double-check that your mobile carrier's signal frequency matches the Band 28 (700MHz) supported by this booster.
7.2 Unstable Signal Strength
- Separació de l'antena: Ensure there is sufficient physical separation between the outdoor and indoor antennas. They should be as far apart as possible, ideally with a wall or ceiling between them, and not in the same horizontal line. Insufficient separation can cause oscillation, leading to unstable signal or no boost.
- Connexions de cable: Check all coaxial cable connections to ensure they are tight and secure. Loose connections can degrade signal quality.
8. Consells d'usuari
- Col·locació òptima de l'antena: Experiment with the exact placement and orientation of your outdoor antenna. Even small adjustments can lead to significant improvements in signal capture.
- Maximize Separation: Always strive for maximum physical separation between the outdoor and indoor antennas. This is the most critical factor in preventing feedback and ensuring efficient boosting.
- Check Signal Before Installation: Before committing to a permanent installation, use a mobile app or your phone's field test mode to verify the exact frequency and strength of the signal at your chosen outdoor antenna location.
9. Garantia i Suport
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your seller directly. Keep your purchase receipt as proof of purchase.




