1. Overview
The Atcall 3K cell phone booster is designed to enhance 5G and 4G LTE signals for all major U.S. carriers, including Verizon, AT&T, T-Mobile, and Straight Talk. It operates on bands 12/17, 13, 5, 2/25, and 4. This booster provides reliable signal for multiple users and devices simultaneously, covering areas up to 3,000 sq. ft. It features a 68dB high gain for faster internet connections and improved call quality, making it suitable for homes, offices, garages, basements, and remote areas. A smart LCD monitor displays real-time signal changes and working status, assisting with quick installation and troubleshooting.
Before ordering or installing, ensure your outdoor signal strength is at least -110dBm.
2. Package Contents
- 1 x 3K Booster Unit
- 1 x Indoor Whip Antenna
- 1 x Outdoor Directional Antenna
- 1 x Booster Wall Mount Bracket
- 1 x Roof/Pole Mount Bracket
- 1 x 60ft Coaxial Cable
- 1 x Power Supply
Figure 2.1: All components included in the Atcall 3K Cell Phone Booster kit.
3. Safety Information
The Atcall 3K Cell Phone Booster is FCC Approved (FCC ID:2A34B-SFZN005). Adherence to installation guidelines is crucial for safe and effective operation.
- Registration: This is a CONSUMER device. BEFORE USE, you MUST REGISTER this device with your wireless provider and have your provider's consent. Most wireless providers consent to the use of signal boosters. Some providers may not consent to the use of this device on their network. If you are unsure, contact your provider.
- Antenna Installation: The outdoor directional antenna needs to be installed on the rooftop. Exercise caution during installation. Antennas MUST be installed at least 20 cm (8 inches) from any person.
- Approved Equipment: You MUST operate this device with approved antennas and cables as specified by the manufacturer.
- Interference: You MUST cease operating this device immediately if requested by the FCC or a licensed wireless service provider. FCC regulations limit the gain and output power of all consumer boosters to low values to avoid interference to cell towers. Improper installation might trigger immediate reduction of the booster's gain and power.
- E911 Information: E911 location information may not be provided or may be inaccurate for calls served by using this device.
- Usage: This device may be operated ONLY in a fixed location for in-building use.
Figure 3.1: FCC and ISED Approval details on the booster unit.
4. Setup
4.1. Check Outdoor Signal Strength
Before installing the outdoor antenna, it is crucial to verify your current outdoor signal strength. The booster requires at least -110dBm of existing signal to function effectively.
For iPhone:
- Dial *3001#12345#* then press the call button.
- Choose All Metrics, click Serving Cell Info.
- Check Band Info.
For Android Phone:
- Download "Network Cell Info Lite" app.
- Choose "GAUGE".
- Check "BAND".
Figure 4.1: Methods for checking frequency band on mobile devices.
4.2. Install Outdoor Antenna
Select a location on your rooftop or a pole that offers the best possible signal reception and is directed towards the nearest cell tower. Use the provided Roof/Pole Mount Bracket to securely attach the Outdoor Directional Antenna. Connect one end of the 60ft coaxial cable to the outdoor antenna.
Figure 4.2: Outdoor directional antenna installed on a roof.
4.3. Place Booster Unit
Position the 3K Booster unit indoors. It is critical to maintain a minimum separation of 30 feet vertically or 20 feet horizontally between the outdoor and indoor antennas to prevent signal oscillation. The booster can be placed on a desktop or mounted to a wall using the Booster Wall Mount Bracket.
Figure 4.3: Booster unit placement options.
Figure 4.4: Recommended antenna separation distances.
4.4. Connect Indoor Whip Antenna
Connect the Indoor Whip Antenna to the "Indoor" port on the booster unit. Position the indoor antenna to effectively cover the desired area within your home or office.
Figure 4.5: Indoor whip antenna coverage area.
4.5. Connect Power Supply
Connect the power adapter to the booster unit and plug it into a standard electrical outlet. The LCD monitor will illuminate, indicating the unit is powered on and beginning operation.
4.6. Installation Video Guide
Video 4.1: Quick video steps guide for installing the Atcall 3K Signal Booster.
5. Operating Instructions
The Atcall 3K Cell Phone Booster features a smart LCD monitor that provides real-time feedback on its performance. This allows for easy monitoring and optimization of your signal.
5.1. LCD Monitor Display
The LCD screen displays key indicators:
- Outdoor Signal Strength: Shows the strength of the signal received by the outdoor antenna.
- Indoor Signal Strength: Shows the strength of the signal broadcast by the indoor antenna.
- Frequency Band: Indicates which cellular bands (12/17, 13, 5, 2/25, 4) are being boosted.
- Uplink/Downlink Gain: Displays the amplification level for incoming and outgoing signals.
- Operating Status: Provides information on the booster's current state, including any alarms.
Figure 5.1: Detailed view of the HD LCD Display.
5.2. Signal Optimization
After initial setup, monitor the Outdoor Signal Strength on the LCD. If the signal is not optimal, slightly adjust the direction of the outdoor antenna until the highest possible signal strength is achieved. This fine-tuning ensures maximum performance from your booster.
Video 5.1: Demonstration of the Atcall 3K Cell Phone Booster for Home, showing signal improvement.
6. Maintenance
- Keep the booster unit and antennas clean and free from dust. Use a soft, dry cloth for cleaning.
- Regularly check all cable connections to ensure they are secure and free from damage.
- Avoid placing the booster in areas with extreme temperatures, high humidity, or direct sunlight.
- Ensure proper ventilation around the booster unit to prevent overheating.
7. Troubleshooting
If you experience issues with your Atcall 3K Cell Phone Booster, refer to the following common troubleshooting steps:
- No Signal/Weak Signal:
- Verify the outdoor antenna is correctly aimed at the nearest cell tower.
- Ensure adequate separation between the outdoor and indoor antennas (minimum 30ft vertical or 20ft horizontal).
- Check all coaxial cable connections for tightness and ensure they are not damaged.
- Confirm the power supply is securely connected and the booster is powered on.
- Check the LCD monitor for any error messages or low signal readings.
- Alarm on LCD: An "Alarm" message on the LCD indicates abnormal operation. This could be due to:
- Signal Oscillation: The indoor antenna is receiving signal from the outdoor antenna. Increase separation distance.
- Overload: The booster is receiving too strong an input signal. Adjust outdoor antenna direction slightly.
- Cable Issue: Check for damaged or improperly connected cables.
- Poor Call Quality/Slow Data:
- Re-adjust the outdoor antenna for optimal signal strength.
- Ensure the indoor antenna is positioned to provide the best coverage in your desired area.
- Check for any new obstructions (e.g., trees, buildings) that might be blocking the outdoor antenna's line of sight to the cell tower.
8. Specifications
- Model: 3K
- Brand: Atcall
- Package Dimensions: 14.37 x 9.17 x 4.65 inches
- Item Weight: 5.61 pounds
- Special Feature: Indoor Whip Antenna (Simplified Installation), LCD Monitor
- Compatible Devices: Smartphones, tablets, and other mobile devices using Verizon, AT&T, T-Mobile, and Straight Talk networks.
- Manufacturer: Atcall
- First Available Date: December 5, 2025
9. Warranty and Support
Atcall is committed to providing high-quality products and excellent customer service. Your Atcall 3K Cell Phone Booster comes with professional online technical support.
If you encounter any issues or have questions regarding the installation, operation, or maintenance of your device, please do not hesitate to contact Atcall's technical support team. They are available to assist you with troubleshooting and ensuring optimal performance of your booster.