One challenge for installers is measuring the cellular received signal strength in order to estimate the coverage area a building signal booster system will provide. If your installation is only concerned with one service provider, it's fairly easy and straight forward - just put a cell phone into test mode or, for most Android devices, check Settings, About Phone, Status.
However, if you have larger install where you're required to boost the signal for multiple service providers, you could use a device for each provider or invest in a much more expensive spectrum analyzer.
For professional installers, Wilson Electronics has developed an RF Signal Detector for cellular and for most service providers in the US.
The Wilson RF Signal Detector allows the installer to test downlink signal strength before and after cellular amplifier system installation. It works with the 800 MHz (Cellular), 1900 MHz (PCS), 2100 MHz (AWS) and 700 MHz LTE (bands 12 and 13) frequency bands.
Wilson also has a handy Directional Antenna kit to use with the device.
You can find it on our web site at: Wilson RF Signal Detector