You can check it out through the websites like www.cellmapper.net or www.antennasearch.com
A cell phone booster works by pulling in weak signal, boosting it, and then rebroadcasting it inside your area in need.
Most signal boosters includes three parts:
The Outside Antenna to capture weak cell signal.
The Amplifier to boost the weak signal.
The Inside Antenna to rebroadcast the enhanced signal inside your home or car.
Please go throgh the link and check it out.
https://www.signalbooster.com/blogs/news/how-to-measure-signal-strength-in-decibels-on-your-cell-phone
All FCC certified cell phone signal boosters we carry are perfectly legal to use in United States. For Canada, all IC (Industry Certified) cell phone boosters are perfectly legal to use in Canada. If not certified, a cell phone signal booster may not work as required and may damage the Carriers networks when they don’t stop if oscillation occurs. This is the reason why some uncertified signal boosters in the market are illegal.
Unfortunately, signal boosters do not improve wifi signals, only cellular signals such as 3G & 4G LTE for most major US & Canadian carriers.
FCC regulations require that anyone who operates a cell phone signal booster register the booster with their cellular carrier. Below are links to the online booster registration forms for major U.S. carriers.
AT&T
https://securec45.securewebsession.com/attsignalbooster.com/
Verizon
http://www.verizonwireless.com/wcms/consumer/register-signal-booster.html
Sprint
http://www.sprint.com/legal/fcc_boosters.html
T-Mobile
https://support.t-mobile.com/docs/DOC-9827
US Cellular
http://www.uscellular.com/uscellular/support/fcc-booster-registration.jsp/
No, there is never a monthly subscription fee. Each HiBoost cell signal booster is a one-time purchase.
The answer is yes! Typically, decibel strength is decreased by 3-4 dB for each 100 ft. of cable on the 800 cellular band, and around 7 dBs on the 1800/1900 PCS band. This means that the higher the frequency, the more the signal decreases. For the AT&T and Verizon 700 LTE bands, signal strength would decrease 3-4 dBs, as on the cellular band. Signal strength would decrease for the T-Mobile AWS 4G band by 7 dB for each 100 ft. of cable length, similar to the PCS band. Should the length of cable between the cell amplifier and antenna be quite long, boosters with lower signal strength are often used in order to extend the signal along the cable line.
The FCC ruling made it clear that cell phone signal boosters are a legal and important part of the wireless infrastructure of the USA. All major carriers in the United States gave their consent in public, and on paper, to signal boosters. These include the top United States cellular service providers AT&T Wireless, Verizon Wireless, T-Mobile USA, and Sprint.
Every cell phone signal booster installation has its own unique set of circumstances and therefore time for installing a signal amplifier system varies greatly. However, on average, it takes between 1 to 2 hours.