I am very impressed with this technology. The delevopment of cellphones, also known as mobile phones, cellular phones and sometimes spelled as celfon has truly changed the way of communication by people. Imagine wherever or whenever you are in the every corner of the world, as long as there is a signal, you can make and receive a call from anywhere. Sometimes if the signal is poor, there is this so-called wilson cellular booster which is designed to boost your cell signal. Don’t you know that weak signal can be caused by some reasons like poor cell tower location coverage, electrical interference, concrete wall construction and other factors. Don’t you know that the the first handheld mobile phone was demonstrated by Dr. Martin Cooper of Motorola in 1973, using a handset weighing 2 kg. Thanks to wikipedia for this information and respect to Dr. Cooper for this technological invention.