Symptoms
- Signal indoors still weak despite the booster being installed
- Booster's indicator lights show an error or low signal
- Improvement is minimal compared to before installation
- Works in one room but not others
Likely causes
- CommonOutdoor antenna not positioned for the best outdoor signalBoosters need a clear, strong outdoor signal to amplify; poor outdoor placement limits the whole system.
- CommonIndoor and outdoor antennas placed too close togetherInsufficient separation between the two antennas can cause oscillation and reduce the booster's effective power.
- PossibleBeing very far from the nearest cell towerBoosters amplify existing signal, so an extremely weak starting signal has less to work with.
- PossibleBooster not configured for your specific carrier's frequency bandsSome boosters need to be matched or configured to the exact bands your carrier uses in your area.
- Less commonBooster hardware faultA malfunctioning amplifier unit would show persistent error lights or no improvement anywhere.
What to do
- Check the outdoor antenna placement, aiming it toward the direction of the strongest signal based on a walk-around test with your phone.
- Increase the vertical or horizontal separation between the outdoor and indoor antennas per the manufacturer's guidelines.
- Check the booster's status lights or app for any error codes indicating oscillation or poor input signal.
- Confirm the booster supports your specific carrier's frequency bands.
- Test signal strength with your phone in different rooms relative to the indoor antenna placement.
- Restart the booster by power cycling it.
- Check the manufacturer's setup guide for optimal antenna mounting height and orientation.
- If signal remains weak after adjusting antenna placement and confirming band compatibility, contact the booster manufacturer's support for a professional setup assessment.
When to call a pro
If the booster still doesn't improve reception after adjusting antenna placement and separation, the manufacturer or an installer can assess your specific setup.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.