The most important part of the installation of these cell phone signal booster is the installation of outdoor antenna, this antenna is installed at a place where signal reception is good and this antenna captures the weak signals and those signals which are generally left by most of the cell phones and boost them, after boosting these signals are retransmitted to the cell phone using the internal antenna. Generally these outdoor antennas are placed on the windows from where they can collect signals from the outside of the building to give good signal strength inside the building.
For testing when I switch own the spot wave cell phone repeater the signals shoot up from one to three or four bars. At this level the conversation was no crystal clear but the no of missing words and robot noises were much lesser. Reception after installing this cell phone signal amplifier was good enough for business calls and it will get 7.5 out of 10 in terms of sound clarity.
After testing a booster device it was also proved that cell phone accessories can improve the working of the cell phone.